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codegen.c

/* src/vm/jit/sparc64/codegen.c - machine code generator for Sparc

   Copyright (C) 1996-2005, 2006, 2007, 2008
   CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO

   This file is part of CACAO.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2, or (at
   your option) any later version.

   This program is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
   02110-1301, USA.

*/


#include "config.h"

#include <assert.h>
#include <stdint.h>
#include <stdio.h>

#include "vm/types.h"

#include "md-abi.h"

/* #include "vm/jit/sparc64/arch.h" */
#include "vm/jit/sparc64/codegen.h"
#include "vm/jit/sparc64/emit.h"

#include "mm/memory.h"

#include "native/jni.h"
#include "native/localref.h"
#include "native/native.h"
#include "vm/builtin.h"
#include "vm/exceptions.h"
#include "vm/global.h"

#include "vm/jit/abi.h"
#include "vm/jit/asmpart.h"
#include "vm/jit/codegen-common.h"
#include "vm/jit/dseg.h"
#include "vm/jit/emit-common.h"
#include "vm/jit/jit.h"
#include "vm/jit/linenumbertable.h"
#include "vm/jit/parse.h"
#include "vm/jit/patcher.h"
#include "vm/jit/reg.h"
#include "vm/jit/replace.h"
#include "vm/jit/stacktrace.h"

#include "vmcore/loader.h"
#include "vmcore/options.h"

#include "vm/jit/sparc64/solaris/macro_rename.h"

#define BUILTIN_FLOAT_ARGS 1

/* XXX use something like this for window control ? 
 * #define REG_PV (own_window?REG_PV_CALLEE:REG_PV_CALLER)
 */
#define REG_PV REG_PV_CALLEE

bool fits_13(s4 disp)
{
      /*
      if ((disp < -4096) || (disp > 4095))
            printf("disp %d\n", disp);
      */

      return (disp >= -4096) && (disp <= 4095);
}

s4 get_lopart_disp(disp)
{
      s4 lodisp;
      
      if (disp > 0)
            lodisp = setlo_part(disp);
      else {
            if (setlo_part(disp) == 0)
                  lodisp = 0;
            else
                  lodisp = setlo_part(disp) | 0x1c00;
      }
            
      return lodisp;
}

#ifndef NDEBUG
bool check_13bit_imm(s8 imm)
{
      s4 sign = (imm >> 12) & 0x1;

      if (sign == 0) {
            if ((imm & ~0xfff) == 0) return true; /* pos imm. */
      }
      else
            if ((imm & ~0xfff) + 0xfff == -1) return true; /* neg imm. */
      
      printf("immediate out-of-bounds: %ld\n", imm);
      return false;
}
#endif
      

/* codegen_emit ****************************************************************

   Generates machine code.

*******************************************************************************/

bool codegen_emit(jitdata *jd)
{
      methodinfo         *m;
      codeinfo           *code;
      codegendata        *cd;
      registerdata       *rd;
      s4                  len, s1, s2, s3, d, disp, slots;
      varinfo            *var;
      basicblock         *bptr;
      instruction        *iptr;
      u2                  currentline;
      constant_classref  *cr;
      methodinfo         *lm;             /* local methodinfo for ICMD_INVOKE*  */
      unresolved_method  *um;
      builtintable_entry *bte;
      methoddesc         *md;
      fieldinfo          *fi;
      unresolved_field   *uf;
      s4                  fieldtype;
      s4                  varindex;

      /* get required compiler data */

      m  = jd->m;
      code = jd->code;
      cd = jd->cd;
      rd = jd->rd;
      
      /* prevent compiler warnings */

      d = 0;
      currentline = 0;
      lm = NULL;
      bte = NULL;

      {
      s4 i, p, t, l;
      s4 savedregs_num;
      s4 framesize_disp;

#if 0 /* no leaf optimization yet */
      savedregs_num = (code_is_leafmethod(code)) ? 0 : 1;       /* space to save the RA */
#endif
      savedregs_num = WINSAVE_CNT + ABIPARAMS_CNT; /* register-window save area */ 


      /* space to save used callee saved registers */

      savedregs_num += (INT_SAV_CNT - rd->savintreguse);
      savedregs_num += (FLT_SAV_CNT - rd->savfltreguse);

      cd->stackframesize = rd->memuse + savedregs_num;

#if defined(ENABLE_THREADS)        /* space to save argument of monitor_enter */
      if (checksync && code_is_synchronized(code))
            cd->stackframesize++;
#endif

      /* keep stack 16-byte aligned (ABI requirement) */

      if (cd->stackframesize & 1)
            cd->stackframesize++;

      /* create method header */

      (void) dseg_add_unique_address(cd, code);              /* CodeinfoPointer */
      framesize_disp = dseg_add_unique_s4(cd, cd->stackframesize * 8); /* FrameSize       */

      code->synchronizedoffset = JITSTACK + rd->memuse * 8;

      /* REMOVEME: We still need it for exception handling in assembler. */

      if (code_is_leafmethod(code))
            (void) dseg_add_unique_s4(cd, 1);
      else
            (void) dseg_add_unique_s4(cd, 0);

      (void) dseg_add_unique_s4(cd, INT_SAV_CNT - rd->savintreguse); /* IntSave */
      (void) dseg_add_unique_s4(cd, FLT_SAV_CNT - rd->savfltreguse); /* FltSave */

      /* save register window and create stack frame (if necessary) */

      if (cd->stackframesize) {
            if (cd->stackframesize <= 4095)
                  M_SAVE(REG_SP, -cd->stackframesize * 8, REG_SP);
            else {
                  M_ILD_INTERN(REG_ITMP3, REG_PV_CALLER, framesize_disp);
                  M_SUB(REG_ZERO, REG_ITMP3, REG_ITMP3);
                  M_SAVE_REG(REG_SP, REG_ITMP3, REG_SP);
            }
      }

      /* save callee saved float registers (none right now) */
#if 0
      p = cd->stackframesize;
      for (i = FLT_SAV_CNT - 1; i >= rd->savfltreguse; i--) {
            p--; M_DST(rd->savfltregs[i], REG_SP, USESTACK + (p * 8));
      }
#endif

#if !defined(NDEBUG)
      if (JITDATA_HAS_FLAG_VERBOSECALL(jd))
            emit_verbosecall_enter(jd);
#endif
      
      
            /* call monitorenter function */
#if defined(ENABLE_THREADS)
      if (checksync && code_is_synchronized(code)) {
            /* stack offset for monitor argument */

            s1 = rd->memuse;

            /* save float argument registers */

            /* XXX jit-c-call */
            slots = FLT_ARG_CNT;
            ALIGN_STACK_SLOTS(slots);

            M_LDA(REG_SP, REG_SP, -(slots * 8));
            for (i = 0; i < FLT_ARG_CNT; i++)
                  M_DST(abi_registers_float_argument[i], REG_SP, CSTACK +  i * 8);

            s1 += slots;

            /* get correct lock object */

            if (m->flags & ACC_STATIC) {
                  disp = dseg_add_address(cd, &m->clazz->object.header);
                  M_ALD(REG_OUT0, REG_PV, disp);
                  disp = dseg_add_functionptr(cd, LOCK_monitor_enter);
                  M_ALD(REG_ITMP3, REG_PV, disp);
            }
            else {
                  /* copy class pointer: $i0 -> $o0 */
                  M_MOV(REG_RESULT_CALLEE, REG_OUT0);
                  M_BNEZ(REG_OUT0, 3);
                  disp = dseg_add_functionptr(cd, LOCK_monitor_enter);
                  M_ALD(REG_ITMP3, REG_PV, disp);                   /* branch delay */
                  M_ALD_INTERN(REG_ZERO, REG_ZERO, TRAP_NullPointerException);
            }

            M_JMP(REG_RA_CALLER, REG_ITMP3, REG_ZERO);
            M_AST(REG_OUT0, REG_SP, CSTACK + s1 * 8);             /* branch delay */

            /* restore float argument registers */

            for (i = 0; i < FLT_ARG_CNT; i++)
                  M_DLD(abi_registers_float_argument[i], REG_SP, CSTACK + i * 8);

            M_LDA(REG_SP, REG_SP, slots * 8);
      }
#endif


      /* take arguments out of register or stack frame */
      
      md = m->parseddesc;

      for (p = 0, l = 0; p < md->paramcount; p++) {
            t = md->paramtypes[p].type;

            varindex = jd->local_map[l * 5 + t];

            l++;
            if (IS_2_WORD_TYPE(t))    /* increment local counter for 2 word types */
                  l++;

            if (varindex == UNUSED)
                  continue;

            var = VAR(varindex);
            s1 = md->params[p].regoff;
            
            if (IS_INT_LNG_TYPE(t)) {                    /* integer args          */                  

                  s2 = var->vv.regoff;
                  
                  if (!md->params[p].inmemory) {           /* register arguments    */
                        s1 = REG_WINDOW_TRANSPOSE(s1);
                        
                        if (!(var->flags & INMEMORY)) {      /* reg arg -> register   */

                              /* the register allocator does not know about the window. */
                              /* avoid copying the locals from save to save regs by     */
                              /* swapping variables.                                    */

                              {
                              int old_dest = var->vv.regoff;
                              int new_dest = p + 24;

                              /* run through all variables */

                              for (i = 0; i < jd->varcount; i++) {
                                    varinfo* uvar = VAR(i);

                                    if (IS_FLT_DBL_TYPE(uvar->type) || IS_INMEMORY(uvar->flags))
                                          continue;

                                    s2 = uvar->vv.regoff;

                                    /* free the in reg by moving all other references */

                                    if (s2 == new_dest) {
                                          uvar->vv.regoff = old_dest;
                                          /*printf("p%d-var[%d]: moved %d -> %d (to free save reg)\n", p, i, s2, old_dest);*/
                                    }

                                    /* move all variables to the in reg */

                                    if (s2 == old_dest) {
                                          uvar->vv.regoff = new_dest;
                                          /*printf("p%d-var[%d]: moved %d -> %d (to avoid copy)\n", p, i, s2, new_dest);*/
                                    }
                              }
                              }



                        } 
                        else {                             /* reg arg -> spilled    */
                              M_STX(s1, REG_SP, JITSTACK + var->vv.regoff);
                        }

                  } else {                                 /* stack arguments       */
                        if (!(var->flags & INMEMORY)) {      /* stack arg -> register */
                              M_LDX(var->vv.regoff, REG_FP, JITSTACK + s1);

                        } else {                             /* stack arg -> spilled  */
                              /* add the callers window save registers */
                              var->vv.regoff = cd->stackframesize * 8 + s1;
                        }
                  }
            
            } else {                                     /* floating args         */
                  if (!md->params[p].inmemory) {           /* register arguments    */
                        if (!(var->flags & INMEMORY)) {      /* reg arg -> register   */
                              M_FLTMOVE(s1, var->vv.regoff);

                        } else {                                 /* reg arg -> spilled    */
                              M_DST(s1, REG_SP, JITSTACK + var->vv.regoff);
                        }

                  } else {                                 /* stack arguments       */
                        if (!(var->flags & INMEMORY)) {      /* stack-arg -> register */
                              M_DLD(var->vv.regoff, REG_FP, JITSTACK + s1);

                        } else {                             /* stack-arg -> spilled  */
                              var->vv.regoff = cd->stackframesize * 8 + s1;
                        }
                  }
            }
      } /* end for */
      
      
      }
      
      /* end of header generation */ 
      
      /* create replacement points */

      REPLACEMENT_POINTS_INIT(cd, jd);

      /* walk through all basic blocks */

      for (bptr = jd->basicblocks; bptr != NULL; bptr = bptr->next) {

            bptr->mpc = (s4) (cd->mcodeptr - cd->mcodebase);

            if (bptr->flags >= BBREACHED) {

            /* branch resolving */

            codegen_resolve_branchrefs(cd, bptr);
            
            /* handle replacement points */

            REPLACEMENT_POINT_BLOCK_START(cd, bptr);


            /* copy interface registers to their destination */

            len = bptr->indepth;
            MCODECHECK(64+len);
            
#if defined(ENABLE_LSRA)
#error XXX LSRA not tested yet
            if (opt_lsra) {
            while (len) {
                  len--;
                  src = bptr->invars[len];
                  if ((len == bptr->indepth-1) && (bptr->type == BBTYPE_EXH)) {
                              /*                      d = reg_of_var(m, src, REG_ITMP1); */
                              if (!(src->flags & INMEMORY))
                                    d = src->vv.regoff;
                              else
                                    d = REG_ITMP1;
                              M_INTMOVE(REG_ITMP1, d);
                              emit_store(jd, NULL, src, d);
                        }
                  }
            } else {
#endif
            while (len) {
                  len--;
                  var = VAR(bptr->invars[len]);
                  if ((len == bptr->indepth-1) && (bptr->type == BBTYPE_EXH)) {
                        d = codegen_reg_of_var(0, var, REG_ITMP1);
                        M_INTMOVE(REG_ITMP2_XPTR, d);
                        emit_store(jd, NULL, var, d);
                  }
                  else {
                        assert((var->flags & INOUT));
                  }
            }
#if defined(ENABLE_LSRA)
            }
#endif
            /* walk through all instructions */
            
            len = bptr->icount;

            for (iptr = bptr->iinstr; len > 0; len--, iptr++) {
                  if (iptr->line != currentline) {
                        linenumbertable_list_entry_add(cd, iptr->line);
                        currentline = iptr->line;
                  }

            MCODECHECK(64);       /* an instruction usually needs < 64 words      */

            switch (iptr->opc) {

            case ICMD_INLINE_START:
            case ICMD_INLINE_END:
                  break;

            case ICMD_NOP:        /* ...  ==> ...                                 */
                  break;

            case ICMD_CHECKNULL:  /* ..., objectref  ==> ..., objectref           */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  emit_nullpointer_check(cd, iptr, s1);
                  break;
      
            /* constant operations ************************************************/

            case ICMD_ICONST:     /* ...  ==> ..., constant                       */

                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  ICONST(d, iptr->sx.val.i);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LCONST:     /* ...  ==> ..., constant                       */

                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
                  LCONST(d, iptr->sx.val.l);
                  emit_store_dst(jd, iptr, d);
                  break;      

            case ICMD_FCONST:     /* ...  ==> ..., constant                       */

                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                  disp = dseg_add_float(cd, iptr->sx.val.f);
                  M_FLD(d, REG_PV, disp);
                  emit_store_dst(jd, iptr, d);
                  break;
                  
            case ICMD_DCONST:     /* ...  ==> ..., constant                       */

                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                  disp = dseg_add_double(cd, iptr->sx.val.d);
                  M_DLD(d, REG_PV, disp);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_ACONST:     /* ...  ==> ..., constant                       */

                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        cr   = iptr->sx.val.c.ref;
                        disp = dseg_add_unique_address(cd, cr);

                        codegen_add_patch_ref(cd, PATCHER_aconst, cr, disp);

                        M_ALD(d, REG_PV, disp);

                  } 
                  else {
                        if (iptr->sx.val.anyptr == NULL) {
                              M_INTMOVE(REG_ZERO, d);
                        } 
                        else {
                              disp = dseg_add_address(cd, iptr->sx.val.anyptr);
                              M_ALD(d, REG_PV, disp);
                        }
                  }
                  emit_store_dst(jd, iptr, d);
                  break;


            /* load/store/copy/move operations ************************************/

            case ICMD_ILOAD:      /* ...  ==> ..., content of local variable      */
            case ICMD_LLOAD:
            case ICMD_ALOAD:
            case ICMD_FLOAD:
            case ICMD_DLOAD:
            case ICMD_ISTORE:     /* ..., value  ==> ...                          */
            case ICMD_LSTORE:
            case ICMD_FSTORE:
            case ICMD_DSTORE:
            case ICMD_COPY:
            case ICMD_MOVE:

                  emit_copy(jd, iptr);
                  break;
      
            case ICMD_ASTORE:
                  if (!(iptr->flags.bits & INS_FLAG_RETADDR))
                        emit_copy(jd, iptr);
                  break;


            /* pop/dup/swap operations ********************************************/

            /* attention: double and longs are only one entry in CACAO ICMDs      */

            case ICMD_POP:        /* ..., value  ==> ...                          */
            case ICMD_POP2:       /* ..., value, value  ==> ...                   */
                  break;


            /* integer operations *************************************************/

            case ICMD_INEG:       /* ..., value  ==> ..., - value                 */
            case ICMD_LNEG:

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SUB(REG_ZERO, s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_I2L:        /* ..., value  ==> ..., value                   */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_INTMOVE(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_L2I:        /* ..., value  ==> ..., value                   */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SRA_IMM(s1, 0, d); /* sign extend upper 32 bits */
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_INT2BYTE:   /* ..., value  ==> ..., value                   */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SLLX_IMM(s1, 56, d);
                  M_SRAX_IMM( d, 56, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_INT2CHAR:   /* ..., value  ==> ..., value                   */
            
                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SLLX_IMM(s1, 48, d);
                  M_SRLX_IMM( d, 48, d);
                  emit_store_dst(jd, iptr, d);
                  break;
                  
            case ICMD_INT2SHORT:   /* ..., value  ==> ..., value                   */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SLLX_IMM(s1, 48, d);
                  M_SRAX_IMM( d, 48, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IADD:       /* ..., val1, val2  ==> ..., val1 + val2        */
            case ICMD_LADD:

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_ADD(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IINC:
            case ICMD_IADDCONST:  /* ..., value  ==> ..., value + constant        */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if ((iptr->sx.val.i >= -4096) && (iptr->sx.val.i <= 4095)) {
                        M_ADD_IMM(s1, iptr->sx.val.i, d);
                  } else {
                        ICONST(REG_ITMP2, iptr->sx.val.i);
                        M_ADD(s1, REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LADDCONST:  /* ..., value  ==> ..., value + constant        */
                                  /* sx.val.l = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if ((iptr->sx.val.l >= -4096) && (iptr->sx.val.l <= 4095)) {
                        M_ADD_IMM(s1, iptr->sx.val.l, d);
                  } else {
                        LCONST(REG_ITMP2, iptr->sx.val.l);
                        M_ADD(s1, REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_ISUB:       /* ..., val1, val2  ==> ..., val1 - val2        */
            case ICMD_LSUB: 

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SUB(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_ISUBCONST:  /* ..., value  ==> ..., value + constant        */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if ((iptr->sx.val.i >= -4096) && (iptr->sx.val.i <= 4095)) {
                        M_SUB_IMM(s1, iptr->sx.val.i, d);
                  } else {
                        ICONST(REG_ITMP2, iptr->sx.val.i);
                        M_SUB(s1, REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LSUBCONST:  /* ..., value  ==> ..., value - constant        */
                                  /* sx.val.l = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if ((iptr->sx.val.l >= -4096) && (iptr->sx.val.l <= 4095)) {
                        M_SUB_IMM(s1, iptr->sx.val.l, d);
                  } else {
                        LCONST(REG_ITMP2, iptr->sx.val.l);
                        M_SUB(s1, REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IMUL:       /* ..., val1, val2  ==> ..., val1 * val2        */
            case ICMD_LMUL:

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_MULX(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IMULCONST:  /* ..., value  ==> ..., value * constant        */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if ((iptr->sx.val.i >= -4096) && (iptr->sx.val.i <= 4095)) {
                        M_MULX_IMM(s1, iptr->sx.val.i, d);
                  } else {
                        ICONST(REG_ITMP2, iptr->sx.val.i);
                        M_MULX(s1, REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LMULCONST:  /* ..., value  ==> ..., value * constant        */
                                  /* sx.val.l = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if ((iptr->sx.val.l >= -4096) && (iptr->sx.val.l <= 4095)) {
                        M_MULX_IMM(s1, iptr->sx.val.l, d);
                  } else {
                        LCONST(REG_ITMP2, iptr->sx.val.l);
                        M_MULX(s1, REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IDIV:       /* ..., val1, val2  ==> ..., val1 / val2        */
/* XXX could also clear Y and use 32bit div */
                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  emit_arithmetic_check(cd, iptr, s2);
                  M_ISEXT(s1, s1);
                  /* XXX trim s2 like s1 ? */
                  M_DIVX(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LDIV:       /* ..., val1, val2  ==> ..., val1 / val2        */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  emit_arithmetic_check(cd, iptr, s2);
                  M_DIVX(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IREM:       /* ..., val1, val2  ==> ..., val1 % val2        */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  emit_arithmetic_check(cd, iptr, s2);
                  M_ISEXT(s1, s1);
                  /* XXX trim s2 like s1 ? */
                  M_DIVX(s1, s2, REG_ITMP3);
                  M_MULX(s2, REG_ITMP3, REG_ITMP3);
                  M_SUB(s1, REG_ITMP3, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LREM:       /* ..., val1, val2  ==> ..., val1 % val2        */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  emit_arithmetic_check(cd, iptr, s2);
                  M_DIVX(s1, s2, REG_ITMP3);
                  M_MULX(s2, REG_ITMP3, REG_ITMP3);
                  M_SUB(s1, REG_ITMP3, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IDIVPOW2:   /* ..., value  ==> ..., value << constant       */
            case ICMD_LDIVPOW2:   /* val.i = constant                             */
                                  
                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SRAX_IMM(s1, 63, REG_ITMP2);
                  M_SRLX_IMM(REG_ITMP2, 64 - iptr->sx.val.i, REG_ITMP2);
                  M_ADD(s1, REG_ITMP2, REG_ITMP2);
                  M_SRAX_IMM(REG_ITMP2, iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_ISHL:       /* ..., val1, val2  ==> ..., val1 << val2       */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SLL(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;
                  
            case ICMD_LSHL:       /* ..., val1, val2  ==> ..., val1 << val2       */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SLLX(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_ISHLCONST:  /* ..., value  ==> ..., value << constant       */
                                  /* val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SLL_IMM(s1, iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;
                  
            case ICMD_LSHLCONST:  /* ..., value  ==> ..., value << constant       */
                                  /* val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SLLX_IMM(s1, iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_ISHR:       /* ..., val1, val2  ==> ..., val1 >> val2       */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SRA(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_ISHRCONST:  /* ..., value  ==> ..., value >> constant       */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SRA_IMM(s1, iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IUSHR:      /* ..., val1, val2  ==> ..., val1 >>> val2      */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SRL(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IUSHRCONST: /* ..., value  ==> ..., value >>> constant      */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SRL_IMM(s1, iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LSHR:       /* ..., val1, val2  ==> ..., val1 >> val2       */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SRAX(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LSHRCONST:  /* ..., value  ==> ..., value >> constant       */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SRAX_IMM(s1, iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LUSHR:      /* ..., val1, val2  ==> ..., val1 >>> val2      */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SRLX(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LUSHRCONST: /* ..., value  ==> ..., value >>> constant      */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_SRLX_IMM(s1, iptr->sx.val.i, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IAND:       /* ..., val1, val2  ==> ..., val1 & val2        */
            case ICMD_LAND:

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_AND(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IANDCONST:  /* ..., value  ==> ..., value & constant        */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if ((iptr->sx.val.i >= -4096) && (iptr->sx.val.i <= 4095)) {
                        M_AND_IMM(s1, iptr->sx.val.i, d);
                  } else {
                        ICONST(REG_ITMP2, iptr->sx.val.i);
                        M_AND(s1, REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IREMPOW2:   /* ..., value  ==> ..., value % constant           */
                                  /* sx.val.i = constant                             */
                                  /* constant is actually constant - 1               */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if (s1 == d) {
                        M_MOV(s1, REG_ITMP1);
                        s1 = REG_ITMP1;
                  }
                  M_ISEXT(s1, s1); /* trim for 32-bit compare (BGEZ) */
                  if ((iptr->sx.val.i >= 0) && (iptr->sx.val.i <= 4095)) {
                        M_AND_IMM(s1, iptr->sx.val.i, d);
                        M_BGEZ(s1, 5);
                        M_NOP;
                        M_SUB(REG_ZERO, s1, d);
                        M_AND_IMM(d, iptr->sx.val.i, d);
                  } else {
                        ICONST(REG_ITMP2, iptr->sx.val.i);
                        M_AND(s1, REG_ITMP2, d);
                        M_BGEZ(s1, 5);
                        M_NOP;
                        M_SUB(REG_ZERO, s1, d);
                        M_AND(d, REG_ITMP2, d);
                  }
                  M_SUB(REG_ZERO, d, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LANDCONST:  /* ..., value  ==> ..., value & constant        */
                                  /* sx.val.l = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if ((iptr->sx.val.l >= -4096) && (iptr->sx.val.l <= 4095)) {
                        M_AND_IMM(s1, iptr->sx.val.l, d);
                  } else {
                        LCONST(REG_ITMP2, iptr->sx.val.l);
                        M_AND(s1, REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LREMPOW2:   /* ..., value  ==> ..., value % constant        */
                                  /* sx.val.l = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if (s1 == d) {
                        M_MOV(s1, REG_ITMP1);
                        s1 = REG_ITMP1;
                  }
                  if ((iptr->sx.val.l >= -4096) && (iptr->sx.val.l <= 4095)) {
                        M_AND_IMM(s1, iptr->sx.val.l, d);
                        M_BGEZ(s1, 4);
                        M_NOP;
                        M_SUB(REG_ZERO, s1, d);
                        M_AND_IMM(d, iptr->sx.val.l, d);
                  } else {
                        LCONST(REG_ITMP2, iptr->sx.val.l);
                        M_AND(s1, REG_ITMP2, d);
                        M_BGEZ(s1, 4);
                        M_NOP;
                        M_SUB(REG_ZERO, s1, d);
                        M_AND(d, REG_ITMP2, d);
                  }
                  M_SUB(REG_ZERO, d, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IOR:        /* ..., val1, val2  ==> ..., val1 | val2        */
            case ICMD_LOR:

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_OR(s1,s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IORCONST:   /* ..., value  ==> ..., value | constant        */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if ((iptr->sx.val.i >= -4096) && (iptr->sx.val.i <= 4095)) {
                        M_OR_IMM(s1, iptr->sx.val.i, d);
                  } else {
                        ICONST(REG_ITMP2, iptr->sx.val.i);
                        M_OR(s1, REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LORCONST:   /* ..., value  ==> ..., value | constant        */
                                  /* sx.val.l = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if ((iptr->sx.val.l >= -4096) && (iptr->sx.val.l <= 4095)) {
                        M_OR_IMM(s1, iptr->sx.val.l, d);
                  } else {
                        LCONST(REG_ITMP2, iptr->sx.val.l);
                        M_OR(s1, REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IXOR:       /* ..., val1, val2  ==> ..., val1 ^ val2        */
            case ICMD_LXOR:

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_XOR(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IXORCONST:  /* ..., value  ==> ..., value ^ constant        */
                                  /* sx.val.i = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if ((iptr->sx.val.i >= -4096) && (iptr->sx.val.i <= 4095)) {
                        M_XOR_IMM(s1, iptr->sx.val.i, d);
                  } else {
                        ICONST(REG_ITMP2, iptr->sx.val.i);
                        M_XOR(s1, REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LXORCONST:  /* ..., value  ==> ..., value ^ constant        */
                                  /* sx.val.l = constant                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if ((iptr->sx.val.l >= -4096) && (iptr->sx.val.l <= 4095)) {
                        M_XOR_IMM(s1, iptr->sx.val.l, d);
                  } else {
                        LCONST(REG_ITMP2, iptr->sx.val.l);
                        M_XOR(s1, REG_ITMP2, d);
                  }
                  emit_store_dst(jd, iptr, d);
                  break;


            case ICMD_LCMP:       /* ..., val1, val2  ==> ..., val1 cmp val2      */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  M_MOV(REG_ZERO, d);
                  M_XCMOVLT_IMM(-1, d);
                  M_XCMOVGT_IMM(1, d);
                  emit_store_dst(jd, iptr, d);
                  break;


            /* floating operations ************************************************/

            case ICMD_FNEG:       /* ..., value  ==> ..., - value                 */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP2);
                  M_FNEG(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_DNEG:       /* ..., value  ==> ..., - value                 */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP2);
                  M_DNEG(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_FADD:       /* ..., val1, val2  ==> ..., val1 + val2        */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP2);
                  M_FADD(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_DADD:       /* ..., val1, val2  ==> ..., val1 + val2        */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP2);
                  M_DADD(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_FSUB:       /* ..., val1, val2  ==> ..., val1 - val2        */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP2);
                  M_FSUB(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_DSUB:       /* ..., val1, val2  ==> ..., val1 - val2        */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP2);
                  M_DSUB(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_FMUL:       /* ..., val1, val2  ==> ..., val1 * val2        */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP2);
                  M_FMUL(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_DMUL:       /* ..., val1, val2  ==> ..., val1 *** val2      */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP2);
                  M_DMUL(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_FDIV:       /* ..., val1, val2  ==> ..., val1 / val2        */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP2);
                  M_FDIV(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_DDIV:       /* ..., val1, val2  ==> ..., val1 / val2        */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP2);
                  M_DDIV(s1, s2, d);
                  emit_store_dst(jd, iptr, d);
                  break;      

            case ICMD_I2F:
                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  disp = dseg_add_unique_float(cd, 0.0);
                  M_IST (s1, REG_PV_CALLEE, disp);
                  M_FLD (d, REG_PV_CALLEE, disp);
                  M_CVTIF (d, d); /* rd gets translated to double target register */
                  emit_store_dst(jd, iptr, d);
                  break;
                  
            case ICMD_I2D:
                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  disp = dseg_add_unique_float(cd, 0.0);
                  M_IST(s1, REG_PV_CALLEE, disp);
                  M_FLD(REG_FTMP2, REG_PV_CALLEE, disp); /* REG_FTMP2 needs to be a double temp */
                  M_CVTID (REG_FTMP2, d); /* rd gets translated to double target register */
                  emit_store_dst(jd, iptr, d);
                  break;
                  
            case ICMD_L2F:
                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  disp = dseg_add_unique_double(cd, 0.0);
                  M_STX(s1, REG_PV_CALLEE, disp);
                  M_DLD(REG_FTMP3, REG_PV_CALLEE, disp);
                  M_CVTLF(REG_FTMP3, d);
                  emit_store_dst(jd, iptr, d);
                  break;
                  
            case ICMD_L2D:
                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  disp = dseg_add_unique_double(cd, 0.0);
                  M_STX(s1, REG_PV_CALLEE, disp);
                  M_DLD(d, REG_PV_CALLEE, disp);
                  M_CVTLD(d, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_F2I:       /* ..., value  ==> ..., (int) value              */
                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  disp = dseg_add_unique_float(cd, 0.0);
                  
                  /* check for NaN, SPARC overflow is noncompliant (see V9 spec B.5)  */
                  M_FCMP(s1, s1);
                  M_FBU(5);
                  M_MOV(REG_ZERO, d); /* delay slot */
                  
                  M_CVTFI(s1, REG_FTMP2);
                  M_FST(REG_FTMP2, REG_PV_CALLEE, disp);
                  M_ILD(d, REG_PV, disp);
                  emit_store_dst(jd, iptr, d);
                  break;
                  
                         
            case ICMD_D2I:       /* ..., value  ==> ..., (int) value             */
                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  disp = dseg_add_unique_float(cd, 0.0);
                  
                  /* check for NaN, SPARC overflow is noncompliant (see V9 spec B.5)  */
                  M_DCMP(s1, s1);
                  M_FBU(5);
                  M_MOV(REG_ZERO, d); /* delay slot */
                  
                  M_CVTDI(s1, REG_FTMP2);
                  M_FST(REG_FTMP2, REG_PV, disp);
                  M_ILD(d, REG_PV, disp);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_F2L:       /* ..., value  ==> ..., (long) value             */
                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  disp = dseg_add_unique_double(cd, 0.0);
                  
                  /* check for NaN, SPARC overflow is noncompliant (see V9 spec B.5)  */
                  M_FCMP(s1, s1);
                  M_FBU(5);
                  M_MOV(REG_ZERO, d); /* delay slot */
                  
                  M_CVTFL(s1, REG_FTMP2); /* FTMP2 needs to be double reg */
                  M_DST(REG_FTMP2, REG_PV, disp);
                  M_LDX(d, REG_PV, disp);
                  emit_store_dst(jd, iptr, d);
                  break;
                  
            case ICMD_D2L:       /* ..., value  ==> ..., (long) value             */
                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  disp = dseg_add_unique_double(cd, 0.0);
                  
                  /* check for NaN, SPARC overflow is noncompliant (see V9 spec B.5)  */
                  M_DCMP(s1, s1);
                  M_FBU(5);
                  M_MOV(REG_ZERO, d); /* delay slot */
                  
                  M_CVTDL(s1, REG_FTMP2); /* FTMP2 needs to be double reg */
                  M_DST(REG_FTMP2, REG_PV, disp);
                  M_LDX(d, REG_PV, disp);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_F2D:       /* ..., value  ==> ..., (double) value           */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  M_CVTFD(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;
                              
            case ICMD_D2F:       /* ..., value  ==> ..., (float) value            */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP3);
                  M_CVTDF(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;
      
      /* XXX merge F/D versions? only compare instr. is different */
            case ICMD_FCMPL:      /* ..., val1, val2  ==> ..., val1 fcmpl val2    */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  M_FCMP(s1,s2);
                  M_OR_IMM(REG_ZERO, -1, d); /* less by default (less or unordered) */
                  M_CMOVFEQ_IMM(0, d); /* 0 if equal */
                  M_CMOVFGT_IMM(1, d); /* 1 if greater */
                  emit_store_dst(jd, iptr, d);
                  break;
                  
            case ICMD_DCMPL:      /* ..., val1, val2  ==> ..., val1 fcmpl val2    */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);
                  M_DCMP(s1,s2);
                  M_OR_IMM(REG_ZERO, -1, d); /* less by default (less or unordered) */
                  M_CMOVFEQ_IMM(0, d); /* 0 if equal */
                  M_CMOVFGT_IMM(1, d); /* 1 if greater */
                  emit_store_dst(jd, iptr, d);
                  break;
                  
            case ICMD_FCMPG:      /* ..., val1, val2  ==> ..., val1 fcmpg val2    */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);    
                  M_FCMP(s1,s2);
                  M_OR_IMM(REG_ZERO, 1, d); /* greater by default (greater or unordered) */
                  M_CMOVFEQ_IMM(0, d); /* 0 if equal */
                  M_CMOVFLT_IMM(-1, d); /* -1 if less */
                  emit_store_dst(jd, iptr, d);
                  break;
                  
            case ICMD_DCMPG:      /* ..., val1, val2  ==> ..., val1 fcmpg val2    */

                  s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                  s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP3);    
                  M_DCMP(s1,s2);
                  M_OR_IMM(REG_ZERO, 1, d); /* greater by default (greater or unordered) */
                  M_CMOVFEQ_IMM(0, d); /* 0 if equal */
                  M_CMOVFLT_IMM(-1, d); /* -1 if less */
                  emit_store_dst(jd, iptr, d);
                  break;
                  

            /* memory operations **************************************************/

            case ICMD_ARRAYLENGTH: /* ..., arrayref  ==> ..., length              */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  emit_nullpointer_check(cd, iptr, s1);
                  M_ILD(d, s1, OFFSET(java_array_t, size));
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_BALOAD:     /* ..., arrayref, index  ==> ..., value         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_AADD(s2, s1, REG_ITMP3);
                  M_BLDS(d, REG_ITMP3, OFFSET(java_bytearray_t, data[0]));
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_CALOAD:     /* ..., arrayref, index  ==> ..., value         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_AADD(s2, s1, REG_ITMP3);
                  M_AADD(s2, REG_ITMP3, REG_ITMP3);
                  M_SLDU(d, REG_ITMP3, OFFSET(java_chararray_t, data[0]));
                  emit_store_dst(jd, iptr, d);
                  break;                  

            case ICMD_SALOAD:     /* ..., arrayref, index  ==> ..., value         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_AADD(s2, s1, REG_ITMP3);
                  M_AADD(s2, REG_ITMP3, REG_ITMP3);
                  M_SLDS(d, REG_ITMP3, OFFSET(java_shortarray_t, data[0]));
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_IALOAD:     /* ..., arrayref, index  ==> ..., value         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_ASLL_IMM(s2, 2, REG_ITMP3);
                  M_AADD(REG_ITMP3, s1, REG_ITMP3);
                  M_ILD(d, REG_ITMP3, OFFSET(java_intarray_t, data[0]));
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_LALOAD:     /* ..., arrayref, index  ==> ..., value         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_ASLL_IMM(s2, 3, REG_ITMP3);
                  M_AADD(REG_ITMP3, s1, REG_ITMP3);
                  M_LDX(d, REG_ITMP3, OFFSET(java_longarray_t, data[0]));
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_FALOAD:     /* ..., arrayref, index  ==> ..., value         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_ASLL_IMM(s2, 2, REG_ITMP3);
                  M_AADD(REG_ITMP3, s1, REG_ITMP3);
                  M_FLD(d, REG_ITMP3, OFFSET(java_floatarray_t, data[0]));
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_DALOAD:     /* ..., arrayref, index  ==> ..., value         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_ASLL_IMM(s2, 3, REG_ITMP3);
                  M_AADD(REG_ITMP3, s1, REG_ITMP3);
                  M_DLD(d, REG_ITMP3, OFFSET(java_doublearray_t, data[0]));
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_AALOAD:     /* ..., arrayref, index  ==> ..., value         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_ASLL_IMM(s2, POINTERSHIFT, REG_ITMP3);
                  M_AADD(REG_ITMP3, s1, REG_ITMP3);
                  M_ALD(d, REG_ITMP3, OFFSET(java_objectarray_t, data[0]));
                  emit_store_dst(jd, iptr, d);
                  break;

      
            case ICMD_BASTORE:    /* ..., arrayref, index, value  ==> ...         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_AADD(s2, s1, REG_ITMP1);
                  s3 = emit_load_s3(jd, iptr, REG_ITMP3);
                  M_BST(s3, REG_ITMP1, OFFSET(java_bytearray_t, data[0]));
                  break;

            case ICMD_CASTORE:    /* ..., arrayref, index, value  ==> ...         */
            case ICMD_SASTORE:    /* ..., arrayref, index, value  ==> ...         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_AADD(s2, s1, REG_ITMP1);
                  M_AADD(s2, REG_ITMP1, REG_ITMP1);
                  s3 = emit_load_s3(jd, iptr, REG_ITMP3);
                  M_SST(s3, REG_ITMP1, OFFSET(java_chararray_t, data[0]));
                  break;

            case ICMD_IASTORE:    /* ..., arrayref, index, value  ==> ...         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_ASLL_IMM(s2, 2, REG_ITMP2);
                  M_AADD(REG_ITMP2, s1, REG_ITMP1);
                  s3 = emit_load_s3(jd, iptr, REG_ITMP3);
                  M_IST_INTERN(s3, REG_ITMP1, OFFSET(java_intarray_t, data[0]));
                  break;

            case ICMD_LASTORE:    /* ..., arrayref, index, value  ==> ...         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_ASLL_IMM(s2, 3, REG_ITMP2);
                  M_AADD(REG_ITMP2, s1, REG_ITMP1);
                  s3 = emit_load_s3(jd, iptr, REG_ITMP3);
                  M_STX_INTERN(s3, REG_ITMP1, OFFSET(java_longarray_t, data[0]));
                  break;

            case ICMD_FASTORE:    /* ..., arrayref, index, value  ==> ...         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_ASLL_IMM(s2, 2, REG_ITMP2);
                  M_AADD(REG_ITMP2, s1, REG_ITMP1);
                  s3 = emit_load_s3(jd, iptr, REG_FTMP1);
                  M_FST_INTERN(s3, REG_ITMP1, OFFSET(java_floatarray_t, data[0]));
                  break;

            case ICMD_DASTORE:    /* ..., arrayref, index, value  ==> ...         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_ASLL_IMM(s2, 3, REG_ITMP2);
                  M_AADD(REG_ITMP2, s1, REG_ITMP1);
                  s3 = emit_load_s3(jd, iptr, REG_FTMP1);
                  M_DST_INTERN(s3, REG_ITMP1, OFFSET(java_doublearray_t, data[0]));
                  break;


            case ICMD_AASTORE:    /* ..., arrayref, index, value  ==> ...         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  s3 = emit_load_s3(jd, iptr, REG_ITMP3);

                  M_MOV(s1, REG_OUT0);
                  M_MOV(s3, REG_OUT1);
                  disp = dseg_add_functionptr(cd, BUILTIN_FAST_canstore);
                  M_ALD(REG_ITMP3, REG_PV, disp);
                  M_JMP(REG_RA_CALLER, REG_ITMP3, REG_ZERO);
                  M_NOP;
                  emit_arraystore_check(cd, iptr);

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  M_ASLL_IMM(s2, POINTERSHIFT, REG_ITMP2);
                  M_AADD(REG_ITMP2, s1, REG_ITMP1);
                  s3 = emit_load_s3(jd, iptr, REG_ITMP3);
                  /* implicit null-pointer check */
                  M_AST_INTERN(s3, REG_ITMP1, OFFSET(java_objectarray_t, data[0]));
                  break;


            case ICMD_BASTORECONST:   /* ..., arrayref, index  ==> ...            */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_AADD(s2, s1, REG_ITMP1);
                  M_BST(REG_ZERO, REG_ITMP1, OFFSET(java_bytearray_t, data[0]));
                  break;

            case ICMD_CASTORECONST:   /* ..., arrayref, index  ==> ...            */
            case ICMD_SASTORECONST:   /* ..., arrayref, index  ==> ...            */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_AADD(s2, s1, REG_ITMP1);
                  M_AADD(s2, REG_ITMP1, REG_ITMP1);
                  M_SST(REG_ZERO, REG_ITMP1, OFFSET(java_chararray_t, data[0]));
                  break;

            case ICMD_IASTORECONST:   /* ..., arrayref, index  ==> ...            */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_ASLL_IMM(s2, 2, REG_ITMP2);
                  M_AADD(REG_ITMP2, s1, REG_ITMP1);
                  M_IST_INTERN(REG_ZERO, REG_ITMP1, OFFSET(java_intarray_t, data[0]));
                  break;

            case ICMD_LASTORECONST:   /* ..., arrayref, index  ==> ...            */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_ASLL_IMM(s2, 3, REG_ITMP2);
                  M_AADD(REG_ITMP2, s1, REG_ITMP1);
                  M_STX_INTERN(REG_ZERO, REG_ITMP1, OFFSET(java_longarray_t, data[0]));
                  break;

            case ICMD_AASTORECONST:   /* ..., arrayref, index  ==> ...            */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  /* implicit null-pointer check */
                  emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                  M_ASLL_IMM(s2, POINTERSHIFT, REG_ITMP2);
                  M_AADD(REG_ITMP2, s1, REG_ITMP1);
                  M_AST_INTERN(REG_ZERO, REG_ITMP1, OFFSET(java_objectarray_t, data[0]));
                  break;
            

            case ICMD_GETSTATIC:  /* ...  ==> ..., value                          */

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        uf        = iptr->sx.s23.s3.uf;
                        fieldtype = uf->fieldref->parseddesc.fd->type;
                        disp      = dseg_add_unique_address(cd, uf);

                        codegen_add_patch_ref(cd, PATCHER_get_putstatic, uf, disp);
                  } 
                  else {
                        fi        = iptr->sx.s23.s3.fmiref->p.field;
                        fieldtype = fi->type;
                        disp      = dseg_add_address(cd, fi->value);

                        if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->clazz))
                              codegen_add_patch_ref(cd, PATCHER_clinit, fi->clazz, disp);
                  }

                  M_ALD(REG_ITMP1, REG_PV, disp);

                  switch (fieldtype) {
                  case TYPE_INT:
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                        M_ILD_INTERN(d, REG_ITMP1, 0);
                        break;
                  case TYPE_LNG:
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                        M_LDX_INTERN(d, REG_ITMP1, 0);
                        break;
                  case TYPE_ADR:
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                        M_ALD_INTERN(d, REG_ITMP1, 0);
                        break;
                  case TYPE_FLT:
                        d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                        M_FLD_INTERN(d, REG_ITMP1, 0);
                        break;
                  case TYPE_DBL:                      
                        d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                        M_DLD_INTERN(d, REG_ITMP1, 0);
                        break;
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_PUTSTATIC:  /* ..., value  ==> ...                          */

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        uf        = iptr->sx.s23.s3.uf;
                        fieldtype = uf->fieldref->parseddesc.fd->type;
                        disp      = dseg_add_unique_address(cd, uf);

                        codegen_add_patch_ref(cd, PATCHER_get_putstatic, uf, disp);
                  } 
                  else {
                        fi        = iptr->sx.s23.s3.fmiref->p.field;
                        fieldtype = fi->type;
                        disp      = dseg_add_address(cd, fi->value);

                        if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->clazz))
                              codegen_add_patch_ref(cd, PATCHER_clinit, fi->clazz, disp);
                  }

                  M_ALD(REG_ITMP1, REG_PV, disp);

                  switch (fieldtype) {
                  case TYPE_INT:
                        s1 = emit_load_s1(jd, iptr, REG_ITMP2);
                        M_IST_INTERN(s1, REG_ITMP1, 0);
                        break;
                  case TYPE_LNG:
                        s1 = emit_load_s1(jd, iptr, REG_ITMP2);
                        M_STX_INTERN(s1, REG_ITMP1, 0);
                        break;
                  case TYPE_ADR:
                        s1 = emit_load_s1(jd, iptr, REG_ITMP2);
                        M_AST_INTERN(s1, REG_ITMP1, 0);
                        break;
                  case TYPE_FLT:
                        s1 = emit_load_s1(jd, iptr, REG_FTMP2);
                        M_FST_INTERN(s1, REG_ITMP1, 0);
                        break;
                  case TYPE_DBL:
                        s1 = emit_load_s1(jd, iptr, REG_FTMP2);
                        M_DST_INTERN(s1, REG_ITMP1, 0);
                        break;
                  }
                  break;

            case ICMD_PUTSTATICCONST: /* ...  ==> ...                             */
                                      /* val = value (in current instruction)     */
                                      /* following NOP)                           */

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        uf        = iptr->sx.s23.s3.uf;
                        fieldtype = uf->fieldref->parseddesc.fd->type;
                        disp      = dseg_add_unique_address(cd, uf);

                        codegen_add_patch_ref(cd, PATCHER_get_putstatic, uf, disp);
                  } 
                  else {
                        fi        = iptr->sx.s23.s3.fmiref->p.field;
                        fieldtype = fi->type;
                        disp      = dseg_add_address(cd, fi->value);

                        if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->clazz))
                              codegen_add_patch_ref(cd, PATCHER_clinit, fi->clazz, disp);
                  }

                  M_ALD(REG_ITMP1, REG_PV, disp);

                  switch (fieldtype) {
                  case TYPE_INT:
                        M_IST_INTERN(REG_ZERO, REG_ITMP1, 0);
                        break;
                  case TYPE_LNG:
                        M_STX_INTERN(REG_ZERO, REG_ITMP1, 0);
                        break;
                  case TYPE_ADR:
                        M_AST_INTERN(REG_ZERO, REG_ITMP1, 0);
                        break;
                  case TYPE_FLT:
                        M_FST_INTERN(REG_ZERO, REG_ITMP1, 0);
                        break;
                  case TYPE_DBL:
                        M_DST_INTERN(REG_ZERO, REG_ITMP1, 0);
                        break;
                  }
                  break;


            case ICMD_GETFIELD:   /* ...  ==> ..., value                          */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  emit_nullpointer_check(cd, iptr, s1);

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        uf = iptr->sx.s23.s3.uf;

                        fieldtype = uf->fieldref->parseddesc.fd->type;
                        disp      = 0;

                        codegen_add_patch_ref(cd, PATCHER_get_putfield, uf, 0);
                  } 
                  else {
                        fi        = iptr->sx.s23.s3.fmiref->p.field;
                        fieldtype = fi->type;
                        disp      = fi->offset;
                  }

                  switch (fieldtype) {
                  case TYPE_INT:
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                        M_ILD(d, s1, disp);
                        break;
                  case TYPE_LNG:
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                        M_LDX(d, s1, disp);
                        break;
                  case TYPE_ADR:
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                        M_ALD(d, s1, disp);
                        break;
                  case TYPE_FLT:
                        d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                        M_FLD(d, s1, disp);
                        break;
                  case TYPE_DBL:                      
                        d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
                        M_DLD(d, s1, disp);
                        break;
                  default:
                        assert(0);
                        break;
                  }
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_PUTFIELD:   /* ..., objectref, value  ==> ...               */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  emit_nullpointer_check(cd, iptr, s1);

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        uf = iptr->sx.s23.s3.uf;
                        fieldtype = uf->fieldref->parseddesc.fd->type;
                        disp      = 0;
                  }
                  else {
                        uf        = NULL;
                        fi        = iptr->sx.s23.s3.fmiref->p.field;
                        fieldtype = fi->type;
                        disp      = fi->offset;
                        }

                  if (IS_INT_LNG_TYPE(fieldtype))
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  else
                        s2 = emit_load_s2(jd, iptr, REG_FTMP2);

                  if (INSTRUCTION_IS_UNRESOLVED(iptr))
                        codegen_add_patch_ref(cd, PATCHER_get_putfield, uf, 0);

                  switch (fieldtype) {
                  case TYPE_INT:
                        M_IST(s2, s1, disp);
                        break;
                  case TYPE_LNG:
                        M_STX(s2, s1, disp);
                        break;
                  case TYPE_ADR:
                        M_AST(s2, s1, disp);
                        break;
                  case TYPE_FLT:
                        M_FST(s2, s1, disp);
                        break;
                  case TYPE_DBL:
                        M_DST(s2, s1, disp);
                        break;
                  default:
                        assert(0);
                        break;
                  }
                  break;

            case ICMD_PUTFIELDCONST:  /* ..., objectref  ==> ...                  */
                                      /* val = value (in current instruction)     */
                                      /* following NOP)                           */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  emit_nullpointer_check(cd, iptr, s1);

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        unresolved_field *uf = iptr->sx.s23.s3.uf;

                        fieldtype = uf->fieldref->parseddesc.fd->type;

                        codegen_addpatchref(cd, PATCHER_get_putfield,
                                                      uf, 0);

                        if (opt_showdisassemble) {
                              M_NOP; M_NOP;
                        }

                        disp = 0;

                  } else {
                  {
                        fieldinfo *fi = iptr->sx.s23.s3.fmiref->p.field;

                        fieldtype = fi->type;
                        disp = fi->offset;
                  }

                  }

                  switch (fieldtype) {
                  case TYPE_INT:
                        M_IST(REG_ZERO, s1, disp);
                        break;
                  case TYPE_LNG:
                        M_STX(REG_ZERO, s1, disp);
                        break;
                  case TYPE_ADR:
                        M_AST(REG_ZERO, s1, disp);
                        break;
                  case TYPE_FLT:
                        M_FST(REG_ZERO, s1, disp);
                        break;
                  case TYPE_DBL:
                        M_DST(REG_ZERO, s1, disp);
                        break;
                  }
                  break;


            /* branch operations **************************************************/

            case ICMD_ATHROW:       /* ..., objectref ==> ... (, objectref)       */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  M_INTMOVE(s1, REG_ITMP2_XPTR);

#ifdef ENABLE_VERIFIER
                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        unresolved_class *uc = iptr->sx.s23.s2.uc;

                        codegen_add_patch_ref(cd, PATCHER_athrow_areturn, uc, 0);
                  }
#endif /* ENABLE_VERIFIER */

                  disp = dseg_add_functionptr(cd, asm_handle_exception);
                  M_ALD(REG_ITMP1, REG_PV, disp);
                  M_JMP(REG_ITMP3_XPC, REG_ITMP1, REG_ZERO);
                  M_NOP;
                  M_NOP;              /* nop ensures that XPC is less than the end */
                                      /* of basic block                            */
                  ALIGNCODENOP;
                  break;

            case ICMD_GOTO:         /* ... ==> ...                                */
            case ICMD_RET:          /* ... ==> ...                                */

                  emit_br(cd, iptr->dst.block);
                  ALIGNCODENOP;
                  break;

            case ICMD_JSR:          /* ... ==> ...                                */

                  emit_br(cd, iptr->sx.s23.s3.jsrtarget.block);
                  ALIGNCODENOP;
                  break;

            case ICMD_IFNULL:       /* ..., value ==> ...                         */
            case ICMD_IFNONNULL:

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  emit_bccz(cd, iptr->dst.block, iptr->opc - ICMD_IFNULL, s1, BRANCH_OPT_NONE);
                  break;
                  
            /* Note: int compares must not branch on the register directly.       */
            /* Reason is, that register content is not 32-bit clean.              */

            case ICMD_IFEQ:         /* ..., value ==> ...                         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  
                  if ((iptr->sx.val.i >= -4096) && (iptr->sx.val.i <= 4095)) {
                        M_CMP_IMM(s1, iptr->sx.val.i);
                  }
                  else {
                        ICONST(REG_ITMP2, iptr->sx.val.i);
                        M_CMP(s1, REG_ITMP2);
                  }
                  emit_beq(cd, iptr->dst.block);
                  break;

            case ICMD_IFLT:         /* ..., value ==> ...                         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  
                  if ((iptr->sx.val.i >= -4096) && (iptr->sx.val.i <= 4095)) {
                        M_CMP_IMM(s1, iptr->sx.val.i);
                  } 
                  else {
                        ICONST(REG_ITMP2, iptr->sx.val.i);
                        M_CMP(s1, REG_ITMP2);
                  }
                  emit_blt(cd, iptr->dst.block);
                  break;

            case ICMD_IFLE:         /* ..., value ==> ...                         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);

                  if ((iptr->sx.val.i >= -4096) && (iptr->sx.val.i <= 4095)) {
                        M_CMP_IMM(s1, iptr->sx.val.i);
                  }
                  else {
                        ICONST(REG_ITMP2, iptr->sx.val.i);
                        M_CMP(s1, REG_ITMP2);
                  }
                  emit_ble(cd, iptr->dst.block);
                  break;

            case ICMD_IFNE:         /* ..., value ==> ...                         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
            
                  if ((iptr->sx.val.i >= -4096) && (iptr->sx.val.i <= 4095)) {
                        M_CMP_IMM(s1, iptr->sx.val.i);
                  }
                  else {
                        ICONST(REG_ITMP2, iptr->sx.val.i);
                        M_CMP(s1, REG_ITMP2);
                  }
                  emit_bne(cd, iptr->dst.block);
                  break;
                                    
            case ICMD_IFGT:         /* ..., value ==> ...                         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
            
                  if ((iptr->sx.val.i >= -4096) && (iptr->sx.val.i <= 4095)) {
                        M_CMP_IMM(s1, iptr->sx.val.i);
                  } 
                  else {
                        ICONST(REG_ITMP2, iptr->sx.val.i);
                        M_CMP(s1, REG_ITMP2);
                  }
                  emit_bgt(cd, iptr->dst.block);            
                  break;

            case ICMD_IFGE:         /* ..., value ==> ...                         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);

                  if ((iptr->sx.val.i >= -4096) && (iptr->sx.val.i <= 4095)) {
                        M_CMP_IMM(s1, iptr->sx.val.i);
                  }
                  else {
                        ICONST(REG_ITMP2, iptr->sx.val.i);
                        M_CMP(s1, REG_ITMP2);
                  }
                  emit_bge(cd, iptr->dst.block);
                  break;
                  
            case ICMD_IF_LEQ:       /* ..., value ==> ...                         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  if (iptr->sx.val.l == 0)
                        emit_beqz(cd, iptr->dst.block, s1);
                  else {
                        if ((iptr->sx.val.l >= -4096) && (iptr->sx.val.l <= 4095)) {
                              M_CMP_IMM(s1, iptr->sx.val.l);
                        }
                        else {
                              LCONST(REG_ITMP2, iptr->sx.val.l);
                              M_CMP(s1, REG_ITMP2);
                        }
                        emit_beq_xcc(cd, iptr->dst.block);
                  }
                  break;
                  
            case ICMD_IF_LLT:       /* ..., value ==> ...                         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  if (iptr->sx.val.l == 0)
                        emit_bltz(cd, iptr->dst.block, s1);
                  else {
                        if ((iptr->sx.val.l >= -4096) && (iptr->sx.val.l <= 4095)) {
                              M_CMP_IMM(s1, iptr->sx.val.l);
                        } 
                        else {
                              LCONST(REG_ITMP2, iptr->sx.val.l);
                              M_CMP(s1, REG_ITMP2);
                        }
                        emit_blt_xcc(cd, iptr->dst.block);
                  }
                  break;

            case ICMD_IF_LLE:       /* ..., value ==> ...                         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  if (iptr->sx.val.l == 0)
                        emit_blez(cd, iptr->dst.block, s1);
                  else {
                        if ((iptr->sx.val.l >= -4096) && (iptr->sx.val.l <= 4095)) {
                              M_CMP_IMM(s1, iptr->sx.val.l);
                        }
                        else {
                              LCONST(REG_ITMP2, iptr->sx.val.l);
                              M_CMP(s1, REG_ITMP2);
                        }
                        emit_ble_xcc(cd, iptr->dst.block);
                  }
                  break;
                  
            case ICMD_IF_LNE:       /* ..., value ==> ...                         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  if (iptr->sx.val.l == 0)
                        emit_bnez(cd, iptr->dst.block, s1);
                  else {
                        if ((iptr->sx.val.l >= -4096) && (iptr->sx.val.l <= 4095)) {
                              M_CMP_IMM(s1, iptr->sx.val.l);
                        }
                        else {
                              LCONST(REG_ITMP2, iptr->sx.val.l);
                              M_CMP(s1, REG_ITMP2);
                        }
                        emit_bne_xcc(cd, iptr->dst.block);
                  }
                  break;
                                    
            case ICMD_IF_LGT:       /* ..., value ==> ...                         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  if (iptr->sx.val.l == 0)
                        emit_bgtz(cd, iptr->dst.block, s1);
                  else {
                        if ((iptr->sx.val.l >= -4096) && (iptr->sx.val.l <= 4095)) {
                              M_CMP_IMM(s1, iptr->sx.val.l);
                        } 
                        else {
                              LCONST(REG_ITMP2, iptr->sx.val.l);
                              M_CMP(s1, REG_ITMP2);
                        }
                        emit_bgt_xcc(cd, iptr->dst.block);
                  }
                  break;

            case ICMD_IF_LGE:       /* ..., value ==> ...                         */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  if (iptr->sx.val.l == 0)
                        emit_bgez(cd, iptr->dst.block, s1);
                  else {
                        if ((iptr->sx.val.l >= -4096) && (iptr->sx.val.l <= 4095)) {
                              M_CMP_IMM(s1, iptr->sx.val.l);
                        }
                        else {
                              LCONST(REG_ITMP2, iptr->sx.val.l);
                              M_CMP(s1, REG_ITMP2);
                        }
                        emit_bge_xcc(cd, iptr->dst.block);
                  }
                  break;                  
                  

            case ICMD_IF_ACMPEQ:    /* ..., value, value ==> ...                  */
            case ICMD_IF_LCMPEQ:    /* op1 = target JavaVM pc                     */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_beq_xcc(cd, iptr->dst.block);
                  break;

            case ICMD_IF_ICMPEQ:    /* 32-bit compare                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_beq(cd, iptr->dst.block);
                  break;

            case ICMD_IF_ACMPNE:    /* ..., value, value ==> ...                  */
            case ICMD_IF_LCMPNE:    /* op1 = target JavaVM pc                     */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_bne_xcc(cd, iptr->dst.block);
                  break;
                  
            case ICMD_IF_ICMPNE:    /* 32-bit compare                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_bne(cd, iptr->dst.block);
                  break;

            case ICMD_IF_LCMPLT:    /* ..., value, value ==> ...                  */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_blt_xcc(cd, iptr->dst.block);
                  break;
                  
            case ICMD_IF_ICMPLT:    /* 32-bit compare                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_blt(cd, iptr->dst.block);
                  break;

            case ICMD_IF_LCMPGT:    /* ..., value, value ==> ...                  */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_bgt_xcc(cd, iptr->dst.block);
                  break;
                  
            case ICMD_IF_ICMPGT:    /* 32-bit compare                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_bgt(cd, iptr->dst.block);
                  break;

            case ICMD_IF_LCMPLE:    /* ..., value, value ==> ...                  */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_ble_xcc(cd, iptr->dst.block);
                  break;
                  
            case ICMD_IF_ICMPLE:    /* 32-bit compare                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_ble(cd, iptr->dst.block);
                  break;                  
      

            case ICMD_IF_LCMPGE:    /* ..., value, value ==> ...                  */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_bge_xcc(cd, iptr->dst.block);
                  break;
                  
            case ICMD_IF_ICMPGE:    /* 32-bit compare                             */

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                  M_CMP(s1, s2);
                  emit_bge(cd, iptr->dst.block);
                  break;


            case ICMD_IRETURN:      /* ..., retvalue ==> ...                      */
            case ICMD_LRETURN:

                  REPLACEMENT_POINT_RETURN(cd, iptr);

                  s1 = emit_load_s1(jd, iptr, REG_RESULT_CALLEE);
                  M_INTMOVE(s1, REG_RESULT_CALLEE);
                  goto nowperformreturn;

            case ICMD_ARETURN:      /* ..., retvalue ==> ...                      */

                  REPLACEMENT_POINT_RETURN(cd, iptr);

                  s1 = emit_load_s1(jd, iptr, REG_RESULT_CALLEE);
                  M_INTMOVE(s1, REG_RESULT_CALLEE);

#ifdef ENABLE_VERIFIER
                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        unresolved_class *uc = iptr->sx.s23.s2.uc;

                        codegen_add_patch_ref(cd, PATCHER_athrow_areturn, uc, 0);
                  }
#endif /* ENABLE_VERIFIER */
                  goto nowperformreturn;

            case ICMD_FRETURN:      /* ..., retvalue ==> ...                      */
            case ICMD_DRETURN:

                  REPLACEMENT_POINT_RETURN(cd, iptr);

                  s1 = emit_load_s1(jd, iptr, REG_FRESULT);
                  M_DBLMOVE(s1, REG_FRESULT);
                  goto nowperformreturn;

            case ICMD_RETURN:       /* ...  ==> ...                               */
                  
                  REPLACEMENT_POINT_RETURN(cd, iptr);

nowperformreturn:
                  {
                  s4 i, p;
                  
                  p = cd->stackframesize;

#if !defined(NDEBUG)
                  if (JITDATA_HAS_FLAG_VERBOSECALL(jd))
                        emit_verbosecall_exit(jd);
#endif

#if defined(ENABLE_THREADS)
                  if (checksync && code_is_synchronized(code)) {
                        /* XXX jit-c-call */
                        disp = dseg_add_functionptr(cd, LOCK_monitor_exit);
                        M_ALD(REG_ITMP3, REG_PV, disp);

                        /* we need to save fp return value (int saved by window) */

                        switch (iptr->opc) {
                        case ICMD_FRETURN:
                        case ICMD_DRETURN:
                              M_ALD(REG_OUT0, REG_SP, CSTACK + rd->memuse * 8);
                              M_JMP(REG_RA_CALLER, REG_ITMP3, REG_ZERO);
                              M_DST(REG_FRESULT, REG_SP, CSTACK + rd->memuse * 8); /* delay */

                              /* restore the fp return value */

                              M_DLD(REG_FRESULT, REG_SP, CSTACK + rd->memuse * 8);
                              break;
                        case ICMD_IRETURN:
                        case ICMD_LRETURN:
                        case ICMD_ARETURN:
                        case ICMD_RETURN:
                              M_JMP(REG_RA_CALLER, REG_ITMP3, REG_ZERO);
                              M_ALD(REG_OUT0, REG_SP, CSTACK + rd->memuse * 8); /* delay */
                              break;
                        default:
                              assert(false);
                              break;
                        }
                  }
#endif



                  M_RETURN(REG_RA_CALLEE, 8); /* implicit window restore */
                  M_NOP;
                  ALIGNCODENOP;
                  }
                  break;

            case ICMD_TABLESWITCH:  /* ..., index ==> ...                         */
                  {
                  s4 i, l;
                  branch_target_t *table;

                  table = iptr->dst.table;

                  l = iptr->sx.s23.s2.tablelow;
                  i = iptr->sx.s23.s3.tablehigh;
                  
                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  if (l == 0) {
                        M_INTMOVE(s1, REG_ITMP1);
                  }
                  else if (-l >= 4096 && -l <= 4095) {
                        M_ADD_IMM(s1, -l, REG_ITMP1);
                  }
                  else {
                        ICONST(REG_ITMP2, l);
                        M_SUB(s1, REG_ITMP2, REG_ITMP1);
                  }

                  i = i - l + 1; /* number of targets (>0) */


                  /* range check */
                              
                  if (i <= 4095) {
                        M_CMP_IMM(REG_ITMP1, i - 1);
                  }
                  else {
                        ICONST(REG_ITMP2, i - 1);
                        M_CMP(REG_ITMP1, REG_ITMP2);
                  }           
                  emit_bugt(cd, table[0].block); /* default target */

                  /* build jump table top down and use address of lowest entry */

                  table += i;

                  while (--i >= 0) {
                        dseg_add_target(cd, table->block); 
                        --table;
                        }
                  }

                  /* length of dataseg after last dseg_addtarget is used by load */

                  M_ASLL_IMM(REG_ITMP1, POINTERSHIFT, REG_ITMP1);
                  M_AADD(REG_ITMP1, REG_PV, REG_ITMP2);
                  M_ALD(REG_ITMP2, REG_ITMP2, -(cd->dseglen));
                  M_JMP(REG_ZERO, REG_ITMP2, REG_ZERO);
                  M_NOP;
                  ALIGNCODENOP;
                  break;
                  
            case ICMD_LOOKUPSWITCH: /* ..., key ==> ...                           */
                  {
                  s4 i;
                  lookup_target_t *lookup;

                  lookup = iptr->dst.lookup;

                  i = iptr->sx.s23.s2.lookupcount;
                  
                  MCODECHECK((i<<2)+8);
                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);

                  while (--i >= 0) {
                        if ((lookup->value >= -4096) && (lookup->value <= 4095)) {
                              M_CMP_IMM(s1, lookup->value);
                        } else {                            
                              ICONST(REG_ITMP2, lookup->value);
                              M_CMP(s1, REG_ITMP2);
                        }
                        emit_beq(cd, lookup->target.block);
                        ++lookup;
                  }

                  emit_br(cd, iptr->sx.s23.s3.lookupdefault.block);
                  ALIGNCODENOP;
                  break;
                  }


            case ICMD_BUILTIN:      /* ..., arg1, arg2, arg3 ==> ...              */

                  REPLACEMENT_POINT_FORGC_BUILTIN(cd, iptr);

                  bte = iptr->sx.s23.s3.bte;
                  md = bte->md;
                  
                  /* XXX: builtin calling with stack arguments not implemented */
                  assert(md->paramcount <= 5 && md->argfltreguse <= 16);
                  
                  s3 = md->paramcount;

                  MCODECHECK((s3 << 1) + 64);

#ifdef BUILTIN_FLOAT_ARGS /* float args for builtins disabled */

                  /* copy float arguments according to ABI convention */

                  int num_fltregargs = 0;
                  int fltregarg_inswap[16];

                  for (s3 = s3 - 1; s3 >= 0; s3--) {
                        var = VAR(iptr->sx.s23.s2.args[s3]);

                        if (IS_FLT_DBL_TYPE(var->type)) {
                              if (!md->params[s3].inmemory) {
                                    s1 = s3; /*native flt args use argument index directly*/
                                    d = emit_load(jd, iptr, var, REG_FTMP1);
                                    
                                    M_DMOV(d, s1 + 16);
                                    fltregarg_inswap[num_fltregargs] = s1;
                                    num_fltregargs++;
                                    /*printf("builtin: flt arg swap to %d\n", s1 + 16);*/
                              }
                              else {
                                    assert(0);
                              }
                        }
                  }
                  
                  int i;
                  /* move swapped float args to target regs */
                  for (i = 0; i < num_fltregargs; i++) {
                        s1 = fltregarg_inswap[i];
                        M_DMOV(s1 + 16, s1);
                        /*printf("builtin float arg to target reg: %d ==> %d\n", s1+16, s1);*/
                  }
                  
#else
                  assert(md->argfltreguse == 0);
#endif
                  
                  goto gen_method;

            case ICMD_INVOKESTATIC: /* ..., [arg1, [arg2 ...]] ==> ...            */
            case ICMD_INVOKESPECIAL:/* ..., objectref, [arg1, [arg2 ...]] ==> ... */
            case ICMD_INVOKEVIRTUAL:/* op1 = arg count, val.a = method pointer    */
            case ICMD_INVOKEINTERFACE:

                  REPLACEMENT_POINT_INVOKE(cd, iptr);

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        lm = NULL;
                        um = iptr->sx.s23.s3.um;
                        md = um->methodref->parseddesc.md;
                  }
                  else {
                        lm = iptr->sx.s23.s3.fmiref->p.method;
                        um = NULL;
                        md = lm->parseddesc;
                  }

gen_method:
                  s3 = md->paramcount;

                  MCODECHECK((s3 << 1) + 64);

                  /* copy arguments to registers or stack location                  */

                  for (s3 = s3 - 1; s3 >= 0; s3--) {
                        var = VAR(iptr->sx.s23.s2.args[s3]);
                        d  = md->params[s3].regoff;

                        if (var->flags & PREALLOC)
                              continue;

                        if (IS_INT_LNG_TYPE(var->type)) {
                              if (!md->params[s3].inmemory) {
                                    s1 = emit_load(jd, iptr, var, d);
                                    M_INTMOVE(s1, d);
                              } 
                              else {
                                    s1 = emit_load(jd, iptr, var, REG_ITMP1);
                                    M_STX(s1, REG_SP, JITSTACK + d);
                              }
                        }
                        else {
#ifdef BUILTIN_FLOAT_ARGS
                              if (iptr->opc == ICMD_BUILTIN)
                                    continue;
#endif
                                    
                              if (!md->params[s3].inmemory) {
                                    s1 = emit_load(jd, iptr, var, d);
                                    if (IS_2_WORD_TYPE(var->type))
                                          M_DMOV(s1, d);
                                    else
                                          M_FMOV(s1, d);
                              }
                              else {
                                    s1 = emit_load(jd, iptr, var, REG_FTMP1);
                                    M_DST(s1, REG_SP, JITSTACK + d);
                              }
                        }
                  }

                  switch (iptr->opc) {
                  case ICMD_BUILTIN:
                        if (bte->stub == NULL) {
                              disp = dseg_add_functionptr(cd, bte->fp);
                        }
                        else {
                              disp = dseg_add_functionptr(cd, bte->stub);
                        }

                        M_ALD(REG_PV_CALLER, REG_PV, disp);  /* built-in-function pointer */

                        /* XXX jit-c-call */
                        /* generate the actual call */
    
                      M_JMP(REG_RA_CALLER, REG_PV_CALLER, REG_ZERO);
                      M_NOP;
                        REPLACEMENT_POINT_INVOKE_RETURN(cd, iptr);
                        REPLACEMENT_POINT_FORGC_BUILTIN_RETURN(cd, iptr);
                      disp = (s4) (cd->mcodeptr - cd->mcodebase);
                      /* REG_RA holds the value of the jmp instruction, therefore +8 */
                      M_LDA(REG_ZERO, REG_RA_CALLER, -disp + 8); 

                        if (md->returntype.type == TYPE_FLT) {
                              /* special handling for float return value in %f0 */
                              M_FMOV_INTERN(0,1);
                        }
                        break;

                  case ICMD_INVOKESPECIAL:
                        emit_nullpointer_check(cd, iptr, REG_OUT0);
                        /* fall-through */

                  case ICMD_INVOKESTATIC:
                        if (lm == NULL) {
                              disp = dseg_add_unique_address(cd, NULL);

                              codegen_add_patch_ref(cd, PATCHER_invokestatic_special,
                                                            um, disp);
                        }
                        else
                              disp = dseg_add_address(cd, lm->stubroutine);

                        M_ALD(REG_PV_CALLER, REG_PV, disp);          /* method pointer in pv */
                        
                        /* generate the actual call */
    
                      M_JMP(REG_RA_CALLER, REG_PV_CALLER, REG_ZERO);
                      M_NOP;
                        REPLACEMENT_POINT_INVOKE_RETURN(cd, iptr);
                      disp = (s4) (cd->mcodeptr - cd->mcodebase);
                      /* REG_RA holds the value of the jmp instruction, therefore +8 */
                      M_LDA(REG_ZERO, REG_RA_CALLER, -disp + 8); 
                        break;

                  case ICMD_INVOKEVIRTUAL:
                        emit_nullpointer_check(cd, iptr, REG_OUT0);

                        if (lm == NULL) {
                              codegen_add_patch_ref(cd, PATCHER_invokevirtual, um, 0);

                              s1 = 0;
                        }
                        else
                              s1 = OFFSET(vftbl_t, table[0]) +
                                    sizeof(methodptr) * lm->vftblindex;

                        /* implicit null-pointer check */
                        M_ALD(REG_METHODPTR, REG_OUT0,OFFSET(java_object_t, vftbl));
                        M_ALD(REG_PV_CALLER, REG_METHODPTR, s1);
                        
                        /* generate the actual call */
    
                      M_JMP(REG_RA_CALLER, REG_PV_CALLER, REG_ZERO);
                      M_NOP;
                        REPLACEMENT_POINT_INVOKE_RETURN(cd, iptr);
                      disp = (s4) (cd->mcodeptr - cd->mcodebase);
                      /* REG_RA holds the value of the jmp instruction, therefore +8 */
                      M_LDA(REG_ZERO, REG_RA_CALLER, -disp + 8); 
                        break;

                  case ICMD_INVOKEINTERFACE:
                        emit_nullpointer_check(cd, iptr, REG_OUT0);

                        if (lm == NULL) {
                              codegen_add_patch_ref(cd, PATCHER_invokeinterface, um, 0);

                              s1 = 0;
                              s2 = 0;
                        } 
                        else {
                              s1 = OFFSET(vftbl_t, interfacetable[0]) -
                                    sizeof(methodptr*) * lm->clazz->index;

                              s2 = sizeof(methodptr) * (lm - lm->clazz->methods);
                        }

                        /* implicit null-pointer check */
                        M_ALD(REG_METHODPTR, REG_OUT0, OFFSET(java_object_t, vftbl));
                        M_ALD(REG_METHODPTR, REG_METHODPTR, s1);
                        M_ALD(REG_PV_CALLER, REG_METHODPTR, s2);

                      /* generate the actual call */
    
                      M_JMP(REG_RA_CALLER, REG_PV_CALLER, REG_ZERO);
                      M_NOP;
                        REPLACEMENT_POINT_INVOKE_RETURN(cd, iptr);
                      disp = (s4) (cd->mcodeptr - cd->mcodebase);
                      /* REG_RA holds the value of the jmp instruction, therefore +8 */
                      M_LDA(REG_ZERO, REG_RA_CALLER, -disp + 8);
                        break;
                  }

                  /* store return value */

                  d = md->returntype.type;

                  if (d != TYPE_VOID) {
                        if (IS_INT_LNG_TYPE(d)) {
                              s1 = codegen_reg_of_dst(jd, iptr, REG_RESULT_CALLER);
                              M_INTMOVE(REG_RESULT_CALLER, s1);
                        } 
                        else {
                              s1 = codegen_reg_of_dst(jd, iptr, REG_FRESULT);
                              if (IS_2_WORD_TYPE(d)) {
                                    M_DBLMOVE(REG_FRESULT, s1);
                              } else {
                                    M_FLTMOVE(REG_FRESULT, s1);
                              }
                        }
                        emit_store_dst(jd, iptr, s1);
                  }
                  break;


            case ICMD_CHECKCAST:  /* ..., objectref ==> ..., objectref            */
                                  /* val.a: (classinfo*) superclass               */

                  /*  superclass is an interface:
                   *
                   *  OK if ((sub == NULL) ||
                   *         (sub->vftbl->interfacetablelength > super->index) &&
                   *         (sub->vftbl->interfacetable[-super->index] != NULL));
                   *
                   *  superclass is a class:
                   *
                   *  OK if ((sub == NULL) || (0
                   *         <= (sub->vftbl->baseval - super->vftbl->baseval) <=
                   *         super->vftbl->diffvall));
                   */

                  if (!(iptr->flags.bits & INS_FLAG_ARRAY)) {
                        classinfo *super;
                        s4         superindex;

                        if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                              super      = NULL;
                              superindex = 0;
                        }
                        else {
                              super = iptr->sx.s23.s3.c.cls;
                              superindex = super->index;
                        }

                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);

                        /* if class is not resolved, check which code to call */

                        if (super == NULL) {
                              emit_label_beqz(cd, BRANCH_LABEL_1, s1);

                              cr   = iptr->sx.s23.s3.c.ref;
                              disp = dseg_add_unique_s4(cd, 0);         /* super->flags */

                              codegen_add_patch_ref(cd, PATCHER_checkcast_instanceof_flags,
                                                              cr, disp);

                              M_ILD(REG_ITMP2, REG_PV, disp);
                              M_AND_IMM(REG_ITMP2, ACC_INTERFACE, REG_ITMP2);
                              emit_label_beqz(cd, BRANCH_LABEL_2, REG_ITMP2);
                        }

                        /* interface checkcast code */

                        if ((super == NULL) || (super->flags & ACC_INTERFACE)) {
                              if (super == NULL) {
                                    cr = iptr->sx.s23.s3.c.ref;

                                    codegen_add_patch_ref(cd, PATCHER_checkcast_interface,
                                                                    cr, 0);
                              }
                              else {
                                    emit_label_beqz(cd, BRANCH_LABEL_3, s1);
                              }

                              M_ALD(REG_ITMP2, s1, OFFSET(java_object_t, vftbl));
                              M_ILD(REG_ITMP3, REG_ITMP2,
                                          OFFSET(vftbl_t, interfacetablelength));
                              M_ADD_IMM(REG_ITMP3, -superindex, REG_ITMP3);
                              emit_classcast_check(cd, iptr, ICMD_IFLE, REG_ITMP3, s1);

                              M_ALD(REG_ITMP3, REG_ITMP2,
                                      OFFSET(vftbl_t, interfacetable[0]) -
                                      superindex * sizeof(methodptr*));
                              emit_classcast_check(cd, iptr, ICMD_IFEQ, REG_ITMP3, s1);

                              if (super == NULL)
                                    emit_label_br(cd, BRANCH_LABEL_4);
                              else
                                    emit_label(cd, BRANCH_LABEL_3);
                        }

                        /* class checkcast code */

                        if ((super == NULL) || !(super->flags & ACC_INTERFACE)) {
                              if (super == NULL) {
                                    emit_label(cd, BRANCH_LABEL_2);

                                    cr   = iptr->sx.s23.s3.c.ref;
                                    disp = dseg_add_unique_address(cd, NULL);

                                    codegen_add_patch_ref(cd,
                                                                  PATCHER_checkcast_instanceof_class,
                                                                    cr, disp);
                              }
                              else {
                                    disp = dseg_add_address(cd, super->vftbl);

                                    emit_label_beqz(cd, BRANCH_LABEL_5, s1);
                              }

                              M_ALD(REG_ITMP2, s1, OFFSET(java_object_t, vftbl));
                              M_ALD(REG_ITMP3, REG_PV, disp);
                              
                              M_ILD(REG_ITMP2, REG_ITMP2, OFFSET(vftbl_t, baseval));
                              M_ILD(REG_ITMP3, REG_ITMP3, OFFSET(vftbl_t, baseval));
                              M_SUB(REG_ITMP2, REG_ITMP3, REG_ITMP2);
                              M_ALD(REG_ITMP3, REG_PV, disp);
                              M_ILD(REG_ITMP3, REG_ITMP3, OFFSET(vftbl_t, diffval));

                              /*                      } */
                              M_CMP(REG_ITMP3, REG_ITMP2);
                              emit_classcast_check(cd, iptr, BRANCH_ULT, REG_ITMP3, s1);

                              if (super != NULL)
                                    emit_label(cd, BRANCH_LABEL_5);
                        }

                        if (super == NULL) {
                              emit_label(cd, BRANCH_LABEL_1);
                              emit_label(cd, BRANCH_LABEL_4);
                        }

                        d = codegen_reg_of_dst(jd, iptr, s1);
                  }
                  else {
                        /* array type cast-check */

                        s1 = emit_load_s1(jd, iptr, REG_OUT0);
                        M_INTMOVE(s1, REG_OUT0);

                        disp = dseg_add_address(cd, iptr->sx.s23.s3.c.cls);

                        if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                              cr   = iptr->sx.s23.s3.c.ref;
                              disp = dseg_add_unique_address(cd, NULL);

                              codegen_add_patch_ref(cd, PATCHER_builtin_arraycheckcast,
                                                              cr, disp);
                        }
                        else
                              disp = dseg_add_address(cd, iptr->sx.s23.s3.c.cls);

                        M_ALD(REG_OUT1, REG_PV, disp);
                        disp = dseg_add_functionptr(cd, BUILTIN_arraycheckcast);
                        M_ALD(REG_ITMP3, REG_PV, disp);
                        /* XXX jit-c-call */
                        M_JMP(REG_RA_CALLER, REG_ITMP3, REG_ZERO);
                        M_NOP;

                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        emit_classcast_check(cd, iptr, ICMD_IFEQ, REG_RESULT_CALLER, s1);

                        d = codegen_reg_of_dst(jd, iptr, s1);
                  }

                  M_INTMOVE(s1, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            case ICMD_INSTANCEOF: /* ..., objectref ==> ..., intresult            */
                                  /* val.a: (classinfo*) superclass               */

                  /*  superclass is an interface:
                   *    
                   *  return (sub != NULL) &&
                   *         (sub->vftbl->interfacetablelength > super->index) &&
                   *         (sub->vftbl->interfacetable[-super->index] != NULL);
                   *    
                   *  superclass is a class:
                   *    
                   *  return ((sub != NULL) && (0
                   *          <= (sub->vftbl->baseval - super->vftbl->baseval) <=
                   *          super->vftbl->diffvall));
                   */

                  {
                  classinfo *super;
                  vftbl_t   *supervftbl;
                  s4         superindex;

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        super = NULL;
                        superindex = 0;
                        supervftbl = NULL;

                  } else {
                        super = iptr->sx.s23.s3.c.cls;
                        superindex = super->index;
                        supervftbl = super->vftbl;
                  }

                  s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                  d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                  if (s1 == d) {
                        M_MOV(s1, REG_ITMP1);
                        s1 = REG_ITMP1;
                  }

                  M_CLR(d);

                  /* if class is not resolved, check which code to call */

                  if (super == NULL) {
                        emit_label_beqz(cd, BRANCH_LABEL_1, s1);

                        cr   = iptr->sx.s23.s3.c.ref;
                        disp = dseg_add_unique_s4(cd, 0);             /* super->flags */

                        codegen_add_patch_ref(cd, PATCHER_checkcast_instanceof_flags,
                                                        cr, disp);

                        M_ILD(REG_ITMP3, REG_PV, disp);
                        M_AND_IMM(REG_ITMP3, ACC_INTERFACE, REG_ITMP3);
                        emit_label_beqz(cd, BRANCH_LABEL_2, REG_ITMP3);
                  }

                  /* interface instanceof code */

                  if ((super == NULL) || (super->flags & ACC_INTERFACE)) {
                        if (super == NULL) {
                              cr = iptr->sx.s23.s3.c.ref;

                              codegen_add_patch_ref(cd, PATCHER_instanceof_interface,
                                                              cr, 0);
                        }
                        else {
                              emit_label_beqz(cd, BRANCH_LABEL_3, s1);
                        }

                        M_ALD(REG_ITMP1, s1, OFFSET(java_object_t, vftbl));
                        M_ILD(REG_ITMP3, REG_ITMP1, OFFSET(vftbl_t, interfacetablelength));
                        M_CMP_IMM(REG_ITMP3, superindex);
                        M_BLE(4);
                        M_NOP;
                        M_ALD(REG_ITMP1, REG_ITMP1,
                                (s4) (OFFSET(vftbl_t, interfacetable[0]) -
                                          superindex * sizeof(methodptr*)));
                        M_CMOVRNE_IMM(REG_ITMP1, 1, d);      /* REG_ITMP1 != 0  */

                        if (super == NULL)
                              emit_label_br(cd, BRANCH_LABEL_4);
                        else
                              emit_label(cd, BRANCH_LABEL_3);
                  }

                  /* class instanceof code */

                  if ((super == NULL) || !(super->flags & ACC_INTERFACE)) {
                        if (super == NULL) {
                              emit_label(cd, BRANCH_LABEL_2);

                              cr   = iptr->sx.s23.s3.c.ref;
                              disp = dseg_add_unique_address(cd, NULL);

                              codegen_add_patch_ref(cd, PATCHER_checkcast_instanceof_class,
                                                              cr, disp);
                        }
                        else {
                              disp = dseg_add_address(cd, supervftbl);

                              emit_label_beqz(cd, BRANCH_LABEL_5, s1);
                        }

                        M_ALD(REG_ITMP1, s1, OFFSET(java_object_t, vftbl));
                        M_ALD(REG_ITMP2, REG_PV, disp);

                        M_ILD(REG_ITMP1, REG_ITMP1, OFFSET(vftbl_t, baseval));
                        M_ILD(REG_ITMP3, REG_ITMP2, OFFSET(vftbl_t, baseval));
                        M_ILD(REG_ITMP2, REG_ITMP2, OFFSET(vftbl_t, diffval));

                        M_SUB(REG_ITMP1, REG_ITMP3, REG_ITMP1);
                        M_CMP(REG_ITMP1, REG_ITMP2);
                        M_XCMOVULE_IMM(1, d);

                        if (super != NULL)
                              emit_label(cd, BRANCH_LABEL_5);
                  }

                  if (super == NULL) {
                        emit_label(cd, BRANCH_LABEL_1);
                        emit_label(cd, BRANCH_LABEL_4);
                  }

                  emit_store_dst(jd, iptr, d);
                  }
                  break;

            case ICMD_MULTIANEWARRAY:/* ..., cnt1, [cnt2, ...] ==> ..., arrayref  */

                  /* check for negative sizes and copy sizes to stack if necessary  */

                  MCODECHECK((iptr->s1.argcount << 1) + 64);

                  for (s1 = iptr->s1.argcount; --s1 >= 0; ) {

                        var = VAR(iptr->sx.s23.s2.args[s1]);
      
                        /* copy SAVEDVAR sizes to stack */

                        /* Already Preallocated? */

                        if (!(var->flags & PREALLOC)) {
                              s2 = emit_load(jd, iptr, var, REG_ITMP1);
                              M_STX(s2, REG_SP, CSTACK + (s1 * 8));
                        }
                  }

                  /* arg 0 = dimension count */

                  ICONST(REG_OUT0, iptr->s1.argcount);

                  /* is patcher function set? */

                  if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                        disp = dseg_add_unique_address(cd, 0);

                        codegen_add_patch_ref(cd, PATCHER_builtin_multianewarray,
                                                        iptr->sx.s23.s3.c.ref,
                                                        disp);
                  }
                  else
                        disp = dseg_add_address(cd, iptr->sx.s23.s3.c.cls);

                  /* arg 1 = arraydescriptor */

                  M_ALD(REG_OUT1, REG_PV, disp);

                  /* arg 2 = pointer to dimensions = stack pointer (absolute) */

                  M_ADD_IMM(REG_SP, CSTACK, REG_OUT2);

                  /* XXX c abi call */
                  disp = dseg_add_functionptr(cd, BUILTIN_multianewarray);
                  M_ALD(REG_ITMP3, REG_PV, disp);
                  M_JMP(REG_RA_CALLER, REG_ITMP3, REG_ZERO);
                  M_NOP;

                  /* check for exception before result assignment */

                  emit_exception_check(cd, iptr);

                  d = codegen_reg_of_dst(jd, iptr, REG_RESULT_CALLER);
                  M_INTMOVE(REG_RESULT_CALLER, d);
                  emit_store_dst(jd, iptr, d);
                  break;

            default:
                  exceptions_throw_internalerror("Unknown ICMD %d during code generation",
                                                               iptr->opc);
                  return false;
                  
      } /* switch */
            
      } /* for instruction */

      MCODECHECK(64);
      
      /* At the end of a basic block we may have to append some nops,
         because the patcher stub calling code might be longer than the
         actual instruction. So codepatching does not change the
         following block unintentionally. */

      if (cd->mcodeptr < cd->lastmcodeptr) {
            while (cd->mcodeptr < cd->lastmcodeptr) {
                  M_NOP;
            }
      }
            
      } /* if (bptr -> flags >= BBREACHED) */
      } /* for basic block */
      
      /* generate stubs */

      emit_patcher_stubs(jd);
      
      /* everything's ok */

      return true;      
}


/* codegen_emit_stub_compiler **************************************************

   Emits a stub routine which calls the compiler.
      
*******************************************************************************/

void codegen_emit_stub_compiler(jitdata *jd)
{
      methodinfo  *m;
      codegendata *cd;

      /* get required compiler data */

      m  = jd->m;
      cd = jd->cd;

      /* code for the stub */

      /* no window save yet, user caller's PV */
      M_ALD_INTERN(REG_ITMP1, REG_PV_CALLER, -2 * SIZEOF_VOID_P);  /* codeinfo pointer */
      M_ALD_INTERN(REG_PV_CALLER, REG_PV_CALLER, -3 * SIZEOF_VOID_P);  /* pointer to compiler */
      M_JMP(REG_ZERO, REG_PV_CALLER, REG_ZERO);  /* jump to the compiler, RA is wasted */
      M_NOP;
}


/* codegen_emit_stub_builtin ***************************************************

   Creates a stub routine which calls a builtin function.

*******************************************************************************/

void codegen_emit_stub_builtin(jitdata *jd, builtintable_entry *bte)
{
      codeinfo    *code;
      codegendata *cd;
      methoddesc  *md;
      s4           i;
      s4           disp;
      s4           s1, s2;

      /* get required compiler data */
      code = jd->code;
      cd   = jd->cd;

      /* set some variables */
      md = bte->md;

      /* calculate stack frame size */
      cd->stackframesize =
            WINSAVE_CNT +
            ABIPARAMS_CNT +
            FLT_ARG_CNT +
            sizeof(stackframeinfo_t) / SIZEOF_VOID_P +
            4;                              /* 4 arguments or return value        */


      /* keep stack 16-byte aligned (ABI requirement) */

      if (cd->stackframesize & 1)
            cd->stackframesize++;

      /* create method header */
      (void) dseg_add_unique_address(cd, code);              /* CodeinfoPointer */
      (void) dseg_add_unique_s4(cd, cd->stackframesize * 4); /* FrameSize       */
      (void) dseg_add_unique_s4(cd, 0);                      /* IsLeaf          */
      (void) dseg_add_unique_s4(cd, 0);                      /* IntSave         */
      (void) dseg_add_unique_s4(cd, 0);                      /* FltSave         */

      /* generate stub code */
      M_SAVE(REG_SP, -cd->stackframesize * 8, REG_SP); /* build up stackframe   */

#if defined(ENABLE_GC_CACAO)
      /* Save callee saved integer registers in stackframeinfo (GC may
         need to recover them during a collection). */

      disp = cd->stackframesize * 8 - sizeof(stackframeinfo_t) +
            OFFSET(stackframeinfo_t, intregs) + BIAS;

      for (i = 0; i < INT_SAV_CNT; i++)
            M_AST(abi_registers_integer_saved[i], REG_SP, disp + i * 8);
#endif

      for (i = 0; i < md->paramcount; i++) {
            s1 = md->params[i].regoff;

            switch (md->paramtypes[i].type) {
            case TYPE_INT:
            case TYPE_LNG:
            case TYPE_ADR:
                  break;
            case TYPE_FLT:
            case TYPE_DBL:
                  M_DST(s1, REG_SP, JITSTACK + i * 8);
                  break;
            }
      }

      /* create dynamic stack info */

      M_AADD_IMM(REG_SP, BIAS + cd->stackframesize * 8, REG_OUT0); /* data sp*/
      M_MOV(REG_PV_CALLEE, REG_OUT1); /* PV */
      M_MOV(REG_FP, REG_OUT2); /* java sp */
      M_MOV(REG_RA_CALLEE, REG_OUT3); /* ra */

      disp = dseg_add_functionptr(cd, codegen_stub_builtin_enter);
      M_ALD(REG_ITMP3, REG_PV_CALLEE, disp);
      M_JMP(REG_RA_CALLER, REG_ITMP3, REG_ZERO);
      M_NOP; /* XXX fill me! */


      /* builtins are allowed to have 5 arguments max */

      assert(md->paramcount <= 5);

      /* copy arguments into position */

      for (i = 0; i < md->paramcount; i++) {
            assert(!md->params[i].inmemory);

            s1 = md->params[i].regoff;

            switch (md->paramtypes[i].type) {
            case TYPE_INT:
            case TYPE_LNG:
            case TYPE_ADR:
                  M_MOV(REG_WINDOW_TRANSPOSE(abi_registers_integer_argument[i]), s1);
                  break;
            case TYPE_FLT:
            case TYPE_DBL:
                  M_DLD(s1, REG_SP, JITSTACK + i * 8);
                  break;
            }

      }

      /* call the builtin function */

      disp = dseg_add_functionptr(cd, bte->fp);
      M_ALD(REG_ITMP3, REG_PV_CALLEE, disp); /* load adress of builtin */
      M_JMP(REG_RA_CALLER, REG_ITMP3, REG_ZERO); /* call builtin                */
      M_NOP;                              /* delay slot                         */


      /* save return value */

      if (md->returntype.type != TYPE_VOID) {
            if (IS_INT_LNG_TYPE(md->returntype.type))
                  M_MOV(REG_RESULT_CALLER, REG_RESULT_CALLEE);
            else
                  M_DST(REG_FRESULT, REG_SP, CSTACK);
      }     


      /* remove native stackframe info */

      M_ADD_IMM(REG_FP, BIAS, REG_OUT0); /* datasp, like above */
      disp = dseg_add_functionptr(cd, codegen_stub_builtin_exit);
      M_ALD(REG_ITMP3, REG_PV_CALLEE, disp);
      M_JMP(REG_RA_CALLER, REG_ITMP3, REG_ZERO);
      M_NOP;

      /* restore float return value, int return value already in our return reg */

      if (md->returntype.type != TYPE_VOID) {
            if (IS_FLT_DBL_TYPE(md->returntype.type)) {
                  if (IS_2_WORD_TYPE(md->returntype.type))
                        M_DLD(REG_FRESULT, REG_SP, CSTACK);
                  else
                        M_FLD(REG_FRESULT, REG_SP, CSTACK);
            }
      }


#if defined(ENABLE_GC_CACAO)
      /* Restore callee saved integer registers from stackframeinfo (GC
         might have modified them during a collection). */
        
      disp = cd->stackframesize * 8 - sizeof(stackframeinfo_t) +
            OFFSET(stackframeinfo_t, intregs) + BIAS;

      for (i = 0; i < INT_SAV_CNT; i++)
            M_ALD(abi_registers_integer_saved[i], REG_SP, disp + i * 8);
#endif

      /* return */
      M_RETURN(REG_RA_CALLEE, 8); /* implicit window restore */
      M_NOP;

      /* assert(0); */
}


/* codegen_emit_stub_native ****************************************************

   Emits a stub routine which calls a native method.

*******************************************************************************/

void codegen_emit_stub_native(jitdata *jd, methoddesc *nmd, functionptr f)
{
      methodinfo   *m;
      codeinfo     *code;
      codegendata  *cd;
      methoddesc   *md;
      s4            nativeparams;
      s4            i, j;                 /* count variables                    */
      s4            t;
      s4            s1, s2, disp;
      s4            funcdisp;             /* displacement of the function       */
      s4            fltregarg_offset[FLT_ARG_CNT];

      /* get required compiler data */

      m    = jd->m;
      code = jd->code;
      cd   = jd->cd;

      /* initialize variables */

      md = m->parseddesc;
      nativeparams = (m->flags & ACC_STATIC) ? 2 : 1;

      /* calculate stack frame size */

      cd->stackframesize =
            sizeof(stackframeinfo) / SIZEOF_VOID_P +
            sizeof(localref_table) / SIZEOF_VOID_P +
            md->paramcount +                /* for saving arguments over calls    */
            nmd->memuse +              /* nmd->memuse includes the (6) abi params */
            WINSAVE_CNT;


      /* keep stack 16-byte aligned (ABI requirement) */

      if (cd->stackframesize & 1)
            cd->stackframesize++;

      /* create method header */

      (void) dseg_add_unique_address(cd, code);              /* CodeinfoPointer */
      (void) dseg_add_unique_s4(cd, cd->stackframesize * 8); /* FrameSize       */
      (void) dseg_add_unique_s4(cd, 0);                      /* IsLeaf          */
      (void) dseg_add_unique_s4(cd, 0);                      /* IntSave         */
      (void) dseg_add_unique_s4(cd, 0);                      /* FltSave         */

      /* generate stub code */

      M_SAVE(REG_SP, -cd->stackframesize * 8, REG_SP); /* build up stackframe    */

#if !defined(NDEBUG)
      if (JITDATA_HAS_FLAG_VERBOSECALL(jd))
            emit_verbosecall_enter(jd);
#endif

      /* get function address (this must happen before the stackframeinfo) */

      funcdisp = dseg_add_functionptr(cd, f);

      if (f == NULL)
            codegen_add_patch_ref(cd, PATCHER_resolve_native, m, funcdisp);

      /* save float argument registers */

      assert(ABIPARAMS_CNT >= FLT_ARG_CNT);

      for (i = 0, j = 0; i < md->paramcount && i < FLT_ARG_CNT; i++) {
            if (IS_FLT_DBL_TYPE(md->paramtypes[i].type)) {
                  s1 = WINSAVE_CNT + nmd->memuse + j;
                  M_DST(abi_registers_float_argument[i], REG_SP, BIAS + (s1*8));
                  fltregarg_offset[i] = s1; /* remember stack offset */
                  j++;
            }
      }

      /* prepare data structures for native function call */

      M_ADD_IMM(REG_FP, BIAS, REG_OUT0); /* datasp == top of the stack frame (absolute, ie. + BIAS) */
      M_MOV(REG_PV_CALLEE, REG_OUT1);
      M_MOV(REG_FP, REG_OUT2); /* java sp */
      M_MOV(REG_RA_CALLEE, REG_OUT3);
      disp = dseg_add_functionptr(cd, codegen_start_native_call);
      M_ALD(REG_ITMP3, REG_PV_CALLEE, disp);
      M_JMP(REG_RA_CALLER, REG_ITMP3, REG_ZERO);
      M_NOP; /* XXX fill me! */

      /* remember class argument */

      if (m->flags & ACC_STATIC)
            M_MOV(REG_RESULT_CALLER, REG_ITMP3);

      /* keep float arguments on stack */
#if 0
      for (i = 0, j = 0; i < md->paramcount && i < FLT_ARG_CNT; i++) {
            if (IS_FLT_DBL_TYPE(md->paramtypes[i].type)) {
                  M_DLD(abi_registers_float_argument[i], REG_SP, CSTACK + (j * 8));
                  j++;
            }
      }
#endif

      /* copy or spill arguments to new locations */

      for (i = md->paramcount - 1, j = i + nativeparams; i >= 0; i--, j--) {
            t = md->paramtypes[i].type;

            if (IS_INT_LNG_TYPE(t)) {

                  /* integral types */

                  if (!md->params[i].inmemory) {
                        s1 = md->params[i].regoff;
                        /* s1 refers to the old window, transpose */
                        s1 = REG_WINDOW_TRANSPOSE(s1);

                        if (!nmd->params[j].inmemory) {
                              s2 = nmd->params[j].regoff;
                              M_INTMOVE(s1, s2);
                        } else {
                              /* nmd's regoff is relative to the start of the param array */
                              s2 = BIAS + WINSAVE_CNT * 8 + nmd->params[j].regoff;
                              M_AST(s1, REG_SP, s2);
                        }

                  } else {
                        if (!nmd->params[j].inmemory) {
                              /* JIT stack arg -> NAT reg arg */

                              /* Due to the Env pointer that is always passed, the 6th JIT arg   */
                              /* is the 7th (or 8th w/ class ptr) NAT arg, and goes to the stack */

                              assert(false); /* path never taken */
                        }

                        s1 = md->params[i].regoff + cd->stackframesize * 8;
                        s2 = BIAS + WINSAVE_CNT * 8 + nmd->params[j].regoff;
                        M_ALD(REG_ITMP1, REG_SP, CSTACK + s1);
                        M_AST(REG_ITMP1, REG_SP, s2);
                  }

            } else {

                  /* floating point types */

                  if (!md->params[i].inmemory) {
                        s1 = md->params[i].regoff;

                        if (!nmd->params[j].inmemory) {

                              /* no mapping to regs needed, native flt args use regoff */
                              s2 = nmd->params[j].regoff;

                              /* JIT float regs are still on the stack */
                              M_DLD(s2, REG_SP, BIAS + (fltregarg_offset[i] * 8));
                        } 
                        else {
                              /* not supposed to happen with 16 NAT flt args */
                              assert(false); 
                              /*
                              s2 = nmd->params[j].regoff;
                              if (IS_2_WORD_TYPE(t))
                                    M_DST(s1, REG_SP, CSTACK + (s2 * 8));
                              else
                                    M_FST(s1, REG_SP, CSTACK + (s2 * 8));
                              */
                        }

                  } 
                  else {
                        s1 = md->params[i].regoff;

                        if (!nmd->params[j].inmemory) {

                              /* JIT stack -> NAT reg */

                              s2 = nmd->params[j].regoff;
                              M_DLD(s2, REG_FP, JITSTACK + s1);
                        }
                        else {

                              /* JIT stack -> NAT stack */

                              s2 = WINSAVE_CNT * 8 + nmd->params[j].regoff;

                              /* The FTMP register may already be loaded with args */
                              /* we know $f0 is unused because of the env pointer  */
                              M_DLD(REG_F0, REG_FP, JITSTACK + s1);
                              M_DST(REG_F0, REG_SP, BIAS + s2);
                        }
                  }
            }
      }
      

      /* put class into second argument register */

      if (m->flags & ACC_STATIC)
            M_MOV(REG_ITMP3, REG_OUT1);

      /* put env into first argument register */

      disp = dseg_add_address(cd, _Jv_env);
      M_ALD(REG_OUT0, REG_PV_CALLEE, disp);

      /* do the native function call */

      M_ALD(REG_ITMP3, REG_PV_CALLEE, funcdisp); /* load adress of native method       */
      M_JMP(REG_RA_CALLER, REG_ITMP3, REG_ZERO); /* call native method                 */
      M_NOP;                              /* delay slot                         */

      /* save return value */

      if (md->returntype.type != TYPE_VOID) {
            if (IS_INT_LNG_TYPE(md->returntype.type))
                  M_MOV(REG_RESULT_CALLER, REG_RESULT_CALLEE);
            else
                  M_DST(REG_FRESULT, REG_SP, CSTACK);
      }
      
      /* Note: native functions return float values in %f0 (see ABI) */
      /* we handle this by doing M_FLD below. (which will load the lower word into %f1) */

#if !defined(NDEBUG)
      /* But for the trace function we need to put a flt result into %f1 */
      if (JITDATA_HAS_FLAG_VERBOSECALL(jd)) {
            if (!IS_2_WORD_TYPE(md->returntype.type))
                  M_FLD(REG_FRESULT, REG_SP, CSTACK);
            emit_verbosecall_exit(jd);
      }
#endif

      /* remove native stackframe info */

      M_ADD_IMM(REG_FP, BIAS, REG_OUT0); /* datasp, like above */
      disp = dseg_add_functionptr(cd, codegen_finish_native_call);
      M_ALD(REG_ITMP3, REG_PV_CALLEE, disp);
      M_JMP(REG_RA_CALLER, REG_ITMP3, REG_ZERO);
      M_NOP; /* XXX fill me! */
      M_MOV(REG_RESULT_CALLER, REG_ITMP2_XPTR);

      /* restore float return value, int return value already in our return reg */

      if (md->returntype.type != TYPE_VOID) {
            if (IS_FLT_DBL_TYPE(md->returntype.type)) {
                  if (IS_2_WORD_TYPE(md->returntype.type))
                        M_DLD(REG_FRESULT, REG_SP, CSTACK);
                  else
                        M_FLD(REG_FRESULT, REG_SP, CSTACK);
            }
      }

      /* check for exception */
      M_BNEZ(REG_ITMP2_XPTR, 4);          /* if no exception then return        */
      M_NOP;

      M_RETURN(REG_RA_CALLEE, 8); /* implicit window restore */
      M_NOP;

      /* handle exception */
      
      disp = dseg_add_functionptr(cd, asm_handle_nat_exception);
      M_ALD(REG_ITMP1, REG_PV, disp);     /* load asm exception handler address */
      M_MOV(REG_RA_CALLEE, REG_ITMP3_XPC); /* get exception address             */
      M_JMP(REG_ZERO, REG_ITMP1, REG_ZERO);/* jump to asm exception handler     */
      M_RESTORE(REG_ZERO, 0, REG_ZERO);   /* restore callers window (DELAY)     */
      
      /* generate patcher stubs */

      emit_patcher_stubs(jd);
}

/*
 * These are local overrides for various environment variables in Emacs.
 * Please do not remove this and leave it at the end of the file, where
 * Emacs will automagically detect them.
 * ---------------------------------------------------------------------
 * Local variables:
 * mode: c
 * indent-tabs-mode: t
 * c-basic-offset: 4
 * tab-width: 4
 * End:
 * vim:noexpandtab:sw=4:ts=4:
 */

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